Cannabidivarin (CBDV) Added to Restek’s Selection of Cannabis Reference Standards

Cannabis strains with high levels of cannabidiol (CBD) typically have higher levels of cannabidivarin (CBDV) as well, but accurate quantitation of both compounds for potency and strain ID is a must, especially as interest in using CBDV as an anticonvulsant and anti-nausea treatment continues to rise. Restek now offers a stand-alone CBDV reference standard—in addition to CBD and a host of other compounds—to help labs with the comprehensive analysis of cannabis products.

Restek’s CBDV standard is ideal for creating multipoint (5-point minimum suggested) calibration curves for LC-MS/MS. 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 a U.S. DEA-exempted formulation, no additional customer permits or licensing are required to purchase within the U.S., and because it’s manufactured and QC tested in Restek’s ISO-accredited labs, this new CBDV standard qualifies as a certified reference material (CRM) that satisfies your ISO requirements.

For CBDV, CBD, and other cannabis reference standards, along with the expertise and consumables your lab needs, turn to

New Pesticide CRMs Released Specifically for Cannabis Labs in California and Similar States

Restek’s support for cannabis-testing labs continues to grow. This latest offering will help you meet the specific cannabis analysis needs of California set forth by the Bureau of Cannabis Control for regulated category I and II residual pesticide reporting—and of other states with similar regulations/programs. Ideal for creating multipoint (5-point minimum suggested) calibration curves for GC- and LC-MS/MS, these six mixes of prepared stock standards also eliminate the need for in-house standards preparation. And, as with all certified reference materials (CRMs) manufactured and QC tested in Restek’s ISO-accredited labs, they will satisfy your ISO requirements.

Order today at

New CBGA Reference Standard for Your Cannabis Potency Testing Program

Restek’s ever-growing selection of cannabis reference standards has expanded again with a new cannabigerolic acid (CBGA) CRM. This certified reference material (CRM) is U.S. DEA exempt, so there’s no need to purchase costly neat materials, make your own standards, or deal with DEA forms and registrations. Verified in composition and stability, this CBGA standard is ideal for combining with other Restek cannabinoid CRMs for quantitative potency analysis using the Raptor ARC-18 LC column. And like all Restek certified reference materials (CRMs), it is manufactured and QC tested in ISO-accredited labs to satisfy your ISO requirements.

Your CBGA standard is in stock now at You can also find it, along with the rest of Restek’s cannabis analysis solutions, at

Pyrethrins CRM Added to Restek Single-Compound Standards List for Improved Analysis of Difficult Pesticides

Tractor spraying a field at sunset

Troublesome pesticides can be analyzed more easily and accurately with single-compound standards from Restek. We’ve just added a new pyrethrins CRM to our inventory, so individual reference standards are now available for dicofol, metribuzin, bromacil, lenacil, dodine, anilazine, captan, folpet, and pyrethrins. Use these standards to simplify method development, establish instrument detection limits (IDLs), verify performance, test stability, and resolve degradation issues. Isomeric in nature, the pyrethrins neat material contains the following isomers: cinerin I and II, jasmolin I and II, and pyrethrin I and II. Isomer ratios for each lot are given in elution order on the certificate. Restek is your one-stop shop for accurate, reliable pesticides analysis. We are the only reference standard provider that offers everything you need from sample prep to LC and GC columns
and consumables.

Product Details

Fortify or Calibrate for 203 Pesticides by GC-MS/MS With This Single Restek® CRM Kit

GC-MS/MS Multiresidue Pesticide StandardsGC-MS/MS is the technique of choice for analyzing pesticide residues in many fruits, vegetables, botanicals, and herbals like tea, ginseng, ginger, Echinacea, and dietary supplements. And Restek’s new GC-MS/MS pesticide reference standards kit contains over two hundred compounds pulled from the food safety lists of the FDA, USDA, and other global agencies.

This stock, comprehensive set joins the 204-compound LC-MS/MS kit in Restek’s lineup of world-class certified reference materials (CRMs) for multiresidue pesticide analysis. Both kits are formulated and grouped for maximum long-term stability. Every ampul is quantitatively tested to confirm composition, and detailed support documentation is provided. Restek also supplies an optimized multiresidue pesticide method free of charge; the downloadable XLS file includes conditions and transition tables.

No more long nights or weekends in the lab. No more custom standards. Restek’s food safety experts can help you make quick work of getting the accurate results you need. Combine this ready-made multiresidue pesticide standards kit with Restek’s internal standards, Rxi®-5ms GC columns, Q-sep® QuEChERS sample preparation, inlet liners, and more.

The Industry’s Favorite Reference Standards Packaging Just Got Better—Restek Begins Transition to GHS Labeling

ampule_box_2_ph_arm_2Effective immediately, Restek will be transitioning away from NFPA* to universally recognized GHS labeling for our reference standards.

GHS, or the Globally Harmonized System of Classification and Labeling of Chemicals, is a set of provisions for hazard classification and communication developed by the United Nations. Its goal is to universally label products that can be opened, thus exposing users to the materials contained within, in a way that clearly identifies any potential safety concerns regardless of the user’s language, country, or background. Efforts to implement GHS labeling have begun around the globe; for the United States in particular, OSHA will require that products shipped after June 1, 2015, carry universally recognized GHS labeling to ensure safety regulation compliance.

In order to improve the safety communication included with Restek® reference standards and ensure that we can provide uninterrupted service to our customers, Restek has already started phasing out our use of NFPA labeling. During the transition, Restek customers may receive a mix of GHS- and NFPA-labeled reference standards, but our entire reference standard inventory will be converted to GHS labeling well in advance of the June 1, 2015 deadline. In the near future, we will also begin transitioning our wool, bulk packings for GC and LC columns, and other products to GHS labeling.

Restek has extensively studied the GHS system and OSHA’s requirements for using it to help our customers not only convert their own inventories properly, but also do so ahead of schedule. This change will not affect product composition or quality in any way; it is merely a change in labeling practices. Our goal is to make the transition to GHS labeling compliance as seamless as possible. Our new convenient GHS labels are bar coded with both catalog and lot number, and they are also removable for easy transfer of standard information into lab notebooks.

The conversion to GHS may seem like a challenge to many labs, but relying on Restek’s safety compliance experts and using our reference standards is one way to make the transition easier.

If you have any questions about GHS labeling for Restek® reference standards, contact Jason Fisher by phone at 1‐814‐353‐1300, ext. 2409, or by email.

* Hazard labeling that follows NFPA (National Fire Protection Association) 704 standards is best known for the use of 4 colored diamonds, each most often containing a numeric code.

Restek Offers the Latest USP <467> Class 2 Residual Solvents for Pharma Analysis

Restek is a long-time partner of pharmaceutical QC labs performing residual solvent analysis, and our support continues with the release of an updated Class 2 Mix A reference standard. This standard has been reformulated to include cumene, which was added to the USP Class 2 list in August 2013, and allows labs to successfully detect and quantify solvent residues in compliance with the latest USP <467> guidelines.

As with our other USP <467> mixes, this standard is prepared with the superior quality and reliability you have come to expect from Restek. It is quantitatively tested to confirm composition and stability, and detailed documentation is provided. In addition, being manufactured and QC-tested in Restek’s ISO-accredited labs means this standard will also help satisfy strict ISO requirements for the use of certified reference materials (CRMs).

Restek is your complete supplier for world-class USP <467> residual solvent analysis. Get the up-to-date reference standards, Rxi®-624Sil MS (G43) and Stabilwax® (G16) GC columns, inlet liners, accessories, and applications you need at

About USP <467> Class 2 Residual Solvents:

The United States Pharmacopeia (USP) General Chapter <467> Residual Solvents is a widely used compendial method intended for identifying and quantifying residual solvents in drug substances, drug products, and excipients. This method identifies acceptable amounts of solvent residues that can be present, and the solvents are summarized by class according to their toxicity. Class 2 compounds are nongenotoxic animal carcinogens, and concentrations of these compounds should be limited. Chromatographic analysis is needed for both the Class 1 and Class 2 residual solvents. This new standard reflects the changes made in USP <467> effective August 2013 and replaces Restek® cat.# 36271.


Restek’s New EFSA PAH4 Standard Offers Low-Volatility Accuracy and High-Concentration Versatility

Restek's EFSA PAH4 CRMThe formulations chemists at Restek have developed a new certified reference material (CRM) of four PAHs—benz[a]anthracene, benzo[a]pyrene, benzo[b]fluoranthene, and chrysene—designed for greater convenience, longer shelf life, and increased long-term accuracy. Its high 1,000 µg/mL concentration gives analysts the freedom to dilute as needed for greater control and more economical custom mixes. The toluene solvent offers not only low volatility, but also high miscibility with QuEChERS solvents like acetonitrile. In addition, being manufactured and QC-tested in Restek’s ISO-accredited labs means this standard will also help satisfy strict ISO requirements for the use of CRMs.

Restek’s new PAH standard is ideal for pairing with the rugged and uniquely selective Rxi®-PAH column. This innovative GC column is able to easily separate European Food Safety Authority (EFSA) PAH4 compounds from common interferences like triphenylene; cyclopenta[cd]pyrene; and benzo [k], [ j], and [a] fluoranthenes. Restek also offers Q-sep® QuEChERS salts, Resprep® SPE cartridges, and more for unbeatable PAH analyses in food or environmental samples.

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. .

New Alternate 8260B CRM From Restek Increases Labs’ Flexibility When Analyzing VOCs in Solid Waste

Several issues can cause pentachloroethane to convert into tetrachloroethene, and the resulting elevated level of tetrachloroethene and low-biased pentachloroethane response may lead to failed proficiency tests (PTs) when analyzing VOCs in solid waste by EPA Method 8260B. With the release of its latest MegaMix® certified reference material (CRM), however, Restek saves you the hassle of dealing with this problem.

Restek still produces its ever-popular MegaMix® 8260B CRM (cat.# 30633), which features 76 compounds from the EPA’s list in one convenient ampul, but now, they also offer an alternative. Their new revised 8260B MegaMix® calibration mix (cat.# 30152) excludes pentachloroethane from an otherwise identical formulation, so it is ideal for labs that either have had difficulty with the calibration of tetrachloroethene or do not need to report on pentachloroethane. Labs that experience elevated tetrachloroethene response, but must still accurately test for pentachloroethane have the option of purchasing a single-component standard (cat.# 30404) as a partner to this new mix.

As with all Restek reference standards, you can expect the highest quality and reliability. These mixes are quantitatively analyzed to confirm concentration and identity of each compound, and since they are produced in our ISO-accredited labs, they satisfy requirements for CRMs.

To learn more about both of Restek’s 8260B mixes, visit