Mapping the molecules in base oil

Industry standard methods used in the specification of base oils provide insight into a few predetermined physical-chemical properties. However, to better understand the behaviour of oils in different applications, researchers at Nynas apply increasingly specialised methods to investigate the molecular composition.

“The chemical complexity and extraordinary molecular diversity of heavy petroleum substances, such as base oils, is the major limitation for their full characterisation. To unravel the composition of the heavy petroleum fraction is an overwhelming task, as it exceeds the capabilities of any one method. Instead, a battery of complementary analysis is needed to paint a picture of the substance, and with more analyses, finer details emerge,” explains Elena Minchak, Research Manager at Nynas.

Elena Minchak

Research Manager, Nynas

Only lighter fractions of petroleum, such as low boiling point gasolines (~C4-C10) containing only a few hundred individual components, can be comprehensively analysed by gas chromatography (GC). Moreover, oils with a boiling point below 150° C can be investigated through a comprehensive GCxGC set up using first a non-polar column that separates compounds by volatility and then a polar column for separation according to polarity/functionality.

“This increases the resolution and sensitivity, providing detailed information on the chemical composition of petroleum substances, particularly in the range below C30. The method has been successfully used for middle distillates, such as kerosine and light gas oils, but has limitations for heavier samples. Also, the overlap between naphthenic molecules and aromatics can be significant, risking an overestimation of either class,” says Elena Minchak.

Even so, GCxGC has limitations. Not a standardised method and not validated by the petroleum industry, it is still only used at research laboratories.

The complexity of the heavier oils makes the determination of individual compounds impossible, and the composition is usually expressed in terms of compound classes, revealing the distribution of different classes of molecules. For example, the well-known ASTM D2007 standard test method determines the total concentration of saturates, with polars present in addition to the aromatics. Through SARA analysis, the content of Saturate, Aromatic, Resin and Asphaltene (SARA) fractions can be calculated.

“The GCxGC analysis groups the components into classes such as n-paraffines, iso-paraffines, naphthenes, di-naphthenes, mono-aromatics, naphthenic mono-aromatics, di-aromatics, etc.,” explains Elena Minchak.

For the characterisation of oils that lie outside the analytical window of GC (>C30), advances in mass spectrometry (MS) have provided opportunities. Here, Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS) has emerged as the research analysis, providing the highest performance capabilities in terms of resolution and mass accuracy, followed by Orbitraps and time-of-flight (TOF) mass spectrometers. FTICR MS provides a tremendous amount of information and must therefore be complemented by advanced data processing techniques. Ultra-high resolution will enable assignment of each mass to a unique elemental composition, utilising the concept of homologues series typical for petroleum. Each series being categorised by the class (NnOoSs), type (double-bond equivalent, DBE, or hydrogen deficiency, Z), and carbon number (-CH2 groups).

“Although high resolution mass spectrometry has enabled great advantages, there are still huge challenges to be resolved. The most problematic issue is the ionisation,” says Elena Minchak.

An ideal universal ionisation method would produce ions from different analyte neutrals with equal efficiency. But different ionisation techniques target different types of molecules. Electrospray ionisation (ESI) typically generates positive or negative ions from heteroatom containing compounds. However, non-polar species such as thiophenes, furans, and aromatic hydrocarbons are not readily observed by ESI. Field desorption ionisation (FDI) and atmospheric pressure photo ionisation (APPI) coupled with FTICR MS yield abundant ions from several species not observed by ESI, including benzo- and dibenzothiophenes, furans, and polycyclic aromatic hydrocarbons.

“However, pure saturated hydrocarbon compounds still pose a particularly difficult obstacle to direct mass spectral characterisation because of their tendency to undergo gas-phase reactions and extensive fragmentation during ionisation,” says Elena Minchak.

“One of the focus areas of Nynas Naphthenic research is to further grow our knowledge and fundamental understanding of oils, and we do that through advanced oil analysis. Chemical analysis also provides insight into how the composition could impact the product properties, aiding process development and product design. Furthermore, it enables us to support our customers in certain projects, and to ensure compliance with the regulations.”

“Petroleomics”, devoted to the characterisation of petroleum fractions on a molecular level, is a growing research field and it is important for Nynas to be a part of external research projects with other research organisations to follow up on progress.

Pinpointing PAH and aromatics

  •  In some applications, the content of individual polycyclic hydrocarbons (PAH) needs to be specified. For instance, the tyre oil directive requires oils to have less than 10 ppm of 8 specific polycyclic hydrocarbons, which can be determined by LC-GC/MS according to EN16143:2013. Further analysis of individual hydrocarbons is possible, but no standard method is available, and analyses are only carried out at specialised laboratories with proprietary methods based on high resolution GC-MS with selective ion monitoring and deuterated internal standards for quantification.
  • The aromatic components of a base oil can be analysed by liquid chromatography (LC). For example, HPLC can be used to separate mono-, di-, and polyaromatic components. However, this method can only be used for the lighter lubricants (< 400° C). For high boiling point base oils, the granularity decreases, and the industry standard LC methods can only provide wt% aromatics, with no resolution of the aromatic compounds by ring number (IP368 or ASTM D2007). Recently, advanced nuclear magnetic resonance (NMR) spectroscopic techniques have been tested to provide quantification of aromatic components.

Further reading

Grease lubrication of roller element bearings

Our knowledge of what actually happens when grease lubrication is used has increased dramatically in the last ten years. The latest research gives a new view on how to formulate grease to optimise its effect under different conditions, not least when it comes to adapting the grease to the temperature a machine operates at.

Turkish Delight – a success story

A joint project between Nynas and Petrofer Turkey has delivered a high-performance lubricating grease with some outstanding features. The naphthenic base oil NYNAS® T 600 and Nynas grease expertise played essential roles.

Great in grease

Recent studies show that the NYBASE™ range offers major benefits when used to replace paraffinic Group I oil in existing lube and grease formulations.

THERE IS MORE TO US THAN THIS

We are delighted you are interested in our products. If you have any questions about our products and services, get in touch with your local Nynas contact. Besides top quality oils, we offer a wide range of services, including rapid delivery worldwide, training, seminars and much more. All you have to do is ask.

 Sameen Kadli

Sameen Kadli

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Shoeb Ahmed

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David Barnett

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General Manager

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Samantha Moodley

Customer Service Executive

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Lee Anne Williams

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Lawrence Teo

Lawrence Teo

Area Sales Manager

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Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

David Barnett

David Barnett

General Manager

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Samantha Moodley

Customer Service Executive

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Lee Anne Williams

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 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

David Barnett

David Barnett

General Manager

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Samantha Moodley

Customer Service Executive

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Lee Anne Williams

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David Barnett

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Samantha Moodley

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Lee Anne Williams

Customer Service Coordinator

David Barnett

David Barnett

General Manager

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Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

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Martin Vergara

Customer Service Executive

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Juan Pablo Pace

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Sabine Langmuller

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Martin Vergara

Customer Service Executive

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Customer Service Coordinator

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

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Alistair Meyer

Regional Director

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

 Juan Pablo Pace

Juan Pablo Pace

Customer Service Coordinator

David Barnett

David Barnett

General Manager

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

 Juan Pablo Pace

Juan Pablo Pace

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Henrik Marits

Henrik Marits

Sales Manager

Viktor Risendal

Sales Executive Nordic

Margita Thorén

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

 Henrik Marits

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Sales Executive Nordic

Margita Thorén

Customer Service Coordinator

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Customer Service Executive

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General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Thorsten Wolff

Thorsten Wolff

General Manager Germany & Austria

Lars Fischer

Lars Fischer

Sales Executive Process Oils

 Elena Campmann

Elena Campmann

Customer Service Specialist – Global Processes and Development Lead

Selina Walther

Selina Walther

Customer Service Coordinator

Michelle Krämer

Michelle Krämer

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Ovidiu Nan

Ovidiu Nan

General Manager

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Sabine Langmuller

Customer Service Coordinator

 Henrik Marits

Henrik Marits

Sales Manager

Viktor Risendal

Sales Executive Nordic

Margita Thorén

Customer Service Coordinator

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

 Juan Pablo Pace

Juan Pablo Pace

Customer Service Coordinator

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David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

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Lee Anne Williams

Customer Service Coordinator

David Barnett

David Barnett

General Manager

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Samantha Moodley

Customer Service Executive

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Lee Anne Williams

Customer Service Coordinator

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

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Martin Vergara

Customer Service Executive

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Juan Pablo Pace

Customer Service Coordinator

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

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Juan Pablo Pace

Customer Service Coordinator

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

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Juan Pablo Pace

Customer Service Coordinator

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

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Juan Pablo Pace

Customer Service Coordinator

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Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

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Alistair Meyer

Regional Director

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Ovidiu Nan

General Manager

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Sabine Langmuller

Customer Service Coordinator

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Henrik Marits

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Alistair Meyer

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Shoeb Ahmed

Customer Service Coordinator

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Sibala Libish Kumar

Global Customer Service Specialist & Project lead

 Sameen Kadli

Sameen Kadli

Sales Manager

Shoeb Ahmed

Shoeb Ahmed

Customer Service Coordinator

 Sibala Libish Kumar

Sibala Libish Kumar

Global Customer Service Specialist & Project lead

 Ovidiu Nan

Ovidiu Nan

General Manager

Sabine Langmuller

Sabine Langmuller

Customer Service Coordinator

Daniele Frustagli

General Manager

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

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Alistair Meyer

Regional Director

 Sameen Kadli

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Sales Manager

Shoeb Ahmed

Shoeb Ahmed

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 Sibala Libish Kumar

Sibala Libish Kumar

Global Customer Service Specialist & Project lead

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David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

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Lee Anne Williams

Customer Service Coordinator

 Sameen Kadli

Sameen Kadli

Sales Manager

Shoeb Ahmed

Shoeb Ahmed

Customer Service Coordinator

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Sibala Libish Kumar

Global Customer Service Specialist & Project lead

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Lawrence Teo

Area Sales Manager

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Georgina Ng

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Regional Director

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Margita Thorén

Customer Service Coordinator

 Sameen Kadli

Sameen Kadli

Sales Manager

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Shoeb Ahmed

Customer Service Coordinator

 Sibala Libish Kumar

Sibala Libish Kumar

Global Customer Service Specialist & Project lead

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

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David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

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Lee Anne Williams

Customer Service Coordinator

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Eric Alfosea

Sales Manager France

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Stéphanie Ly

Customer Service Executive

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Christine Le Garrec

Customer Service Coordinator

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Sheilo Mienandi

Customer Service Coordinator

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Henrik Marits

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Sales Executive Nordic

Margita Thorén

Customer Service Coordinator

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Jaap Schoneveld

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Lawrence Teo

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 Georgina Ng

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General Manager

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Samantha Moodley

Customer Service Executive

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Lee Anne Williams

Customer Service Coordinator

David Barnett

David Barnett

General Manager

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Samantha Moodley

Customer Service Executive

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Lee Anne Williams

Customer Service Coordinator

Lawrence Teo

Lawrence Teo

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 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

Daniele Frustagli

General Manager

David Barnett

David Barnett

General Manager

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Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

Daniele Frustagli

General Manager

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Eric Alfosea

Sales Manager France

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Stéphanie Ly

Customer Service Executive

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Christine Le Garrec

Customer Service Coordinator

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David Barnett

General Manager

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Samantha Moodley

Customer Service Executive

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Lee Anne Williams

Customer Service Coordinator

Lawrence Teo

Lawrence Teo

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 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Jaap Schoneveld

Jaap Schoneveld

Sales Manager

 Eric Sprumont

Eric Sprumont

Sales Executive

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

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Marcela Tocelis

Sales Manager / Acting General Manager

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Martin Vergara

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Margita Thorén

Customer Service Coordinator

 Sameen Kadli

Sameen Kadli

Sales Manager

Shoeb Ahmed

Shoeb Ahmed

Customer Service Coordinator

 Sibala Libish Kumar

Sibala Libish Kumar

Global Customer Service Specialist & Project lead

 Sameen Kadli

Sameen Kadli

Sales Manager

Shoeb Ahmed

Shoeb Ahmed

Customer Service Coordinator

 Sibala Libish Kumar

Sibala Libish Kumar

Global Customer Service Specialist & Project lead

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

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Customer Service Coordinator

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Lawrence Teo

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 Georgina Ng

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Customer Service Executive

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Regional Director

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Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

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Customer Service Executive

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Juan Pablo Pace

Customer Service Coordinator

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Sameen Kadli

Sales Manager

Shoeb Ahmed

Shoeb Ahmed

Customer Service Coordinator

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Sibala Libish Kumar

Global Customer Service Specialist & Project lead

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Ovidiu Nan

General Manager

Sabine Langmuller

Sabine Langmuller

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Sameen Kadli

Sameen Kadli

Sales Manager

Shoeb Ahmed

Shoeb Ahmed

Customer Service Coordinator

 Sibala Libish Kumar

Sibala Libish Kumar

Global Customer Service Specialist & Project lead

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

Daniele Frustagli

General Manager

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

 Ovidiu Nan

Ovidiu Nan

General Manager

Sabine Langmuller

Sabine Langmuller

Customer Service Coordinator

 Ovidiu Nan

Ovidiu Nan

General Manager

Sabine Langmuller

Sabine Langmuller

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

 Myriam Picado

Myriam Picado

General Manager / Sales Manager

 Juan Jiménez

Juan Jiménez

Sales Executive

 Jose Luis Maceda

Jose Luis Maceda

Customer Service Coordinator

 Gloria Villaverde Parrado

Gloria Villaverde Parrado

Customer Service Executive

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

 Sameen Kadli

Sameen Kadli

Sales Manager

Shoeb Ahmed

Shoeb Ahmed

Customer Service Coordinator

 Sibala Libish Kumar

Sibala Libish Kumar

Global Customer Service Specialist & Project lead

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

 Juan Pablo Pace

Juan Pablo Pace

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Henrik Marits

Henrik Marits

Sales Manager

Viktor Risendal

Sales Executive Nordic

Margita Thorén

Customer Service Coordinator

Eric Alfosea

Eric Alfosea

Sales Manager France

 Stéphanie Ly

Stéphanie Ly

Customer Service Executive

 Christine Le Garrec

Christine Le Garrec

Customer Service Coordinator

Sheilo Mienandi

Sheilo Mienandi

Customer Service Coordinator

 Sameen Kadli

Sameen Kadli

Sales Manager

Shoeb Ahmed

Shoeb Ahmed

Customer Service Coordinator

 Sibala Libish Kumar

Sibala Libish Kumar

Global Customer Service Specialist & Project lead

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

 Juan Pablo Pace

Juan Pablo Pace

Customer Service Coordinator

Eric Alfosea

Eric Alfosea

Sales Manager France

 Stéphanie Ly

Stéphanie Ly

Customer Service Executive

 Christine Le Garrec

Christine Le Garrec

Customer Service Coordinator

Sheilo Mienandi

Sheilo Mienandi

Customer Service Coordinator

Emil Cuculayef

Emil Cuculayef

Sales Manager

 Banu Kibar

Banu Kibar

Customer Service Executive

Cagatay Gürol

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

 Sameen Kadli

Sameen Kadli

Sales Manager

Shoeb Ahmed

Shoeb Ahmed

Customer Service Coordinator

 Sibala Libish Kumar

Sibala Libish Kumar

Global Customer Service Specialist & Project lead

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

 Juan Pablo Pace

Juan Pablo Pace

Customer Service Coordinator

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Marcela Tocelis

Marcela Tocelis

Sales Manager / Acting General Manager

 Martin Vergara

Martin Vergara

Customer Service Executive

 Juan Pablo Pace

Juan Pablo Pace

Customer Service Coordinator

Lawrence Teo

Lawrence Teo

Area Sales Manager

 Georgina Ng

Georgina Ng

Customer Service Executive

Alistair Meyer

Alistair Meyer

Regional Director

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator

David Barnett

David Barnett

General Manager

 Samantha Moodley

Samantha Moodley

Customer Service Executive

Lee Anne Williams

Lee Anne Williams

Customer Service Coordinator