Advance Your Analysis of Cannabis With Our New Cannabidivarinic Acid (CBDVA) Standard

Cannabidivarinic Acid (CBDVA) is a non-psychoactive cannabinoid reported to have anti-inflammatory properties. While its medicinal benefits are still being researched, quantifying this compound in cannabis samples is crucial for obtaining a true measurement of potency and chemovar identification. Restek now offers a new CBDVA certified reference material (CRM) to help labs advance their analysis of cannabis.

Restek’s new CBDVA standard is ideal for creating multipoint (5-point minimum suggested) calibration curves for LC analysis. With verified composition and stability, this prepared stock product eliminates the need for in-house standards preparation for greater convenience and lower labor requirements. As it’s excluded from U.S. DEA Controlled Substances Act (CSA) regulatory controls, no customer permits or licensing required to purchase within the U.S., and because it’s manufactured and QC tested in Restek’s ISO-accredited labs, this new CBDVA standard qualifies as a certified reference material (CRM) that satisfies your ISO requirements.

For CBDVA and other reference standards, Raptor LC columns, sample preparation products, and the expert consultation your cannabis lab needs, turn to

Scott Adams Speaks About Restek® Pure Chromatography at Pittcon 2015

What can Restek® Pure Chromatography and our 30 years of experience in the industry mean for you and your work? Scott Adams, our GC Accessories Product Marketing Manager, explains in this LabTube video from Pittcon 2015.

Scott Adams at Pittcon 2015

Analyze Cosmetics and Personal Care Products for Ethylene Oxide and 1,4-Dioxane With New Restek® Standards

Restek PEG StandardsEthylene oxide and 1,4-dioxane are considered probable carcinogens by the U.S. EPA and International Agency for Research on Cancer respectively. These compounds are impurities in polyethylene glycol (PEG), but because of the potential danger they pose to humans, they must be removed before PEG can be used as a thickener / softener in cosmetics and personal care products.

Restek has formulated the only off-the-shelf suite of reference standards targeted toward the analysis of PEG-based products to make it easier for labs to verify the safety of shampoos, hand creams, and more. Produced with the specific concentrations needed in the industry, these newest Restek® certified reference materials (CRMs) are quantitatively tested to confirm their composition, and detailed support documentation is provided with each purchase. Because they are manufactured and QC-tested in Restek’s ISO-accredited labs, they also help satisfy ISO requirements.

With the release of these new ready-made reference standards, contract labs and manufacturers of PEG-based cosmetics and personal care products no longer need to order custom standards or make their own mixes.

Accurately Detect and Quantify 204 Pesticides of Global Food Safety Concern by LC-MS/MS

Restek LC-MS/MS Multi-Residue Pesticide KitStop spending your time and money developing LC-MS/MS multi-residue pesticide methods and mixing reference standards when you could be running samples! Restek’s trusted food safety experts have already done the work for you—with guaranteed accuracy and at a lower cost.

Restek’s new certified reference materials (CRMs) for LC-MS/MS multi-residue pesticide analysis eliminate the need to source, purchase, and store individual materials along with the need to prepare your own mixes. Choose separate ampuls for mix-and-match customization or a complete kit that contains 204 compounds of interest, covering many LC-determined pesticides listed by government agencies. Designed for maximum shelf life, stability, and chromatographic performance, each standard ships with support documentation detailing Restek’s rigorous in-house quantitative testing. They even offer an optimized multi-residue pesticide method—including conditions and downloadable transition tables—free of charge.

Set up, verify, and validate your pesticide-screening methods in less time, with proven confidence, and at a significantly reduced cost by turning to Restek’s ISO-accredited labs for your LC-MS/MS multi-residue pesticide certified reference materials. For added convenience and unbeatable results, also consider their internal standards, Ultra and Pinnacle® DB LC columns, and Q-sep™ QuEChERS sample prep products.

Learn more at

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. .

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.




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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

Analyze a Full EPA 524.3 List Using Just Three Ampuls With New Restek EPA 524.3 Certified Reference Materials!

In support of the U.S. Safe Drinking Water Act (SDWA), Restek has formulated a complete set of EPA 524.3 reference standards for the monitoring of purgeable organic compounds in drinking water—using as few as three ampuls! This collection of certified reference materials (CRMs) also covers the seven volatile organic compounds (VOCs) included in the Unregulated Contaminant Monitoring Rule 3 (UCMR3), which requires monitoring of all public drinking water systems with 10,000 or more customers. It is also ideal for surface water and groundwater testing inside or outside the U.S.

This new set of reference standards offers a full 82-component EPA 524.3 list using as few as three ampuls to reduce prep time and chances for error or contamination. The EPA 524.3 VOA MegaMix® ampul includes the required oxygenates group for convenient ordering, while the volatile gases are prepared separately to allow replacement of shorter-life components without wasting money on the full list. Internal and surrogate standards are available independently or as a combined mix, letting analysts choose the option that works best for them. Of course, like all Restek certified reference materials (CRMs), they are manufactured and QC-tested in an ISO-accredited lab to easily satisfy ISO requirements.

Simplify your EPA 524.3 analyses and start saving today with Restek’s new reference standards set.

Restek Adds ISO Guide 34 and 17025 Accreditations—Now Offers a Full Line of Certified Reference Materials

  • Satisfy regulatory requirements by sourcing certified reference materials (CRMs) from an accredited supplier.
  • Benefit from the exceptional product quality and customer service needed to meet strict ISO 9001, Guide 34, and 17025 guidelines.
  • Get the same reliability and documentation with custom-formulated solutions as you do with stock standards—both fall under Restek’s accreditation.
  • Consolidate orders by purchasing primary- and secondary-source reference standards, GC and LC columns, sample prep supplies, and accessories from one vendor.

Restek ISO Quality: 9001, 17025, Guide 34Effective 9 December 2011, Restek’s reference standard manufacturing and QC testing laboratories in Bellefonte, PA, have added ISO Guide 34 and 17025 accreditations to their credentials. Issued by the American Association for Laboratory Accreditation (A2LA), these accreditations—as well as the company’s ISO 9001 registration, which has been maintained since 1994—serve as recognition that Restek and its labs meet the world-class quality standards established by the International Organization for Standardization (ISO).

Many laboratories are required to purchase certified reference materials (CRMs), which are only manufactured and QC tested at ISO-accredited labs like Restek’s. But, even those who do not operate under such restrictions will still benefit from the quality, reliability, and consistency of CRMs. Accredited labs must also have rigorous corrective action and customer satisfaction systems in place, so when you order reference standards from Restek, you can trust that you will receive superior quality and service.

In addition to a full line of options that are in stock and ready to ship, Restek’s custom reference standards are also covered by its ISO Guide 34 and 17025 accreditations. Whether you need something right out of the catalog or a custom-formulated solution, Restek can satisfy all of your primary- and secondary-source certified reference material needs—along with GC and LC columns, sample prep supplies, and accessories. And, you can access documentation for all Restek reference standards online for instant access any time.

To learn more about Restek’s ISO quality credentials and to view the certificates (including scopes of accreditation), please click here or call Restek Corporation at 1-814-353-1300, ext. 3.