Accurately Determine Mineral Oil Hydrocarbons in Food Using Restek’s New MOSH/MOAH Reference Standard

Restek’s New MOSH/MOAH Reference StandardAccording to the German Federal Institute for Risk Assessment (BfR), mineral oil hydrocarbons (MOHs) may damage the liver, heart valves, and lymph nodes. Because the structure of some mineral oil hydrocarbons resembles that of PAHs, they may also be carcinogenic/mutagenic. These dangerous compounds can enter the food supply through farm and production equipment as well as printer ink, but in addition, current technology is unable to sufficiently remove mineral oil hydrocarbons from recycled cardboard. Once the cardboard is used for packaging, volatile hydrocarbons in mineral oils are then able to find their way into our food through gas diffusion.

In short, accurate determination of mineral oil hydrocarbons in food is imperative; however, because they include both aliphatic and aromatic hydrocarbons, analysis is difficult using standard methods. As a result, a special technique has been developed in Switzerland that uses LC coupled with GC-FID, and it is quickly gaining popularity throughout Europe and beyond. In collaboration with its German subsidiary and labs in the EU, Restek has formulated a stock reference standard mix (cat.# 31070) specifically for the analysis of mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH).

This 9-component mix contains non-interfering internal standards as well as both MOSH and MOAH markers to correctly cut fractions for reliable results. Like all of the certified reference materials (CRMs) manufactured and QC-tested in Restek’s ISO-accredited labs, it can also help you satisfy your ISO requirements with ease.

www.restek.com/MOSH-MOAH .

Student Researchers Present at PA Forensic Science Symposium

IMG_6554

Restek’s Michelle Misselwitz discusses forensic applications with student researchers.

The 3rd annual Pennsylvania Forensic Science Student Research Exchange Symposium was held April 5-6, 2013 at The Pennsylvania State University (PSU). Restek was pleased to sponsor this event, as it provides an important opportunity for students in accredited forensic science programs to present their research to faculty, peers, and forensic professionals.

The program began with a job fair reception, during which Restek employees Julie Kowalski, Michelle Misselwitz, and Frances Carroll (all PSU alumni themselves) enjoyed discussing chromatography, forensics, and job opportunities at Restek with potential applicants. Networking opportunities continued following the job fair during the technical poster session. Students presented their work and, according to Restek’s Jack Cochran who also attended, did an outstanding job discussing both the technical aspects and practical applications of their research.

The symposium continued the next day with four sessions of technical presentations. Talks covered a wide range of current topics in forensic science, including chromatographic detection and quantification of drugs, contaminant source identification for polycyclic aromatic hydrocarbons (PAHs) in the environment, and comparison of manual and automated DNA extraction protocols.

As a leading chromatography company, Restek is pleased to sponsor this annual event and appreciates the opportunity to meet with so many talented young researchers. To view current job opportunities at Restek, visit www.restek.com/Contact-Us/Employment-Opportunities

Mitigate Matrix Interference With New Isotopically Labeled Pesticide Residue Internal Standards From Restek

pesticide_standard_prAny food safety chemist can attest that interference is a major concern when performing pesticide residue analysis. But with the release of its expanded line of internal and surrogate reference standards, Restek now offers enough options to mitigate interference in nearly any matrix!

Isotopically labeled to provide the best approach for pesticide residue quantification, these new internal standards are economically priced and compatible with both LC-MS and GC-MS applications. They are even useful for optimizing LC-MS/MS system performance. Like all of the certified reference materials (CRMs) manufactured and QC-tested in Restek’s ISO-accredited labs, they can also help you satisfy your ISO requirements with ease.

 Compound

CAS#

Solvent

Conc. (μg/mL)

cat.#

atrazine-d5

163165-75-1

Acetonitrile

100

31984

carbaryl-d7

362049-56-7

Acetonitrile

100

31985

diazinon-d10 (diethyl-d10)

100155-47-3

Acetonitrile

100

31986

dichlorvos-d6

203645-53-8

Acetone

100

31987

dimethoate-d6

1219794-81-6

Acetonitrile

100

31988

diuron-d6

1007536-67-5

Acetonitrile

100

31989

linuron-d6

330-55-2

Acetonitrile

100

31990

As much as ever, Restek is your complete supplier for world-class food safety analysis: pesticide reference standard mixes and internal/surrogate standards, GC and LC columns and accessories, QuEChERS products, and more.

You will find a full selection of internal pesticide residue standards at www.restek.com

Our Pittcon 2013 Presentations Are Now Online

Did you have the chance to sit in on any of our technical posters and talks at Pittcon 2013? There was so much to do — so much it was simply impossible to see everything — so we wanted to let you know that we’ve posted our presentations on our Pittcon website: www.restek.com/pittcon  Review them at your leisure, and feel free to get in touch with the authors directly to discuss them further.