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.
Resprep EPH fractionation SPE cartridges offer method-specific performance for extractable petroleum hydrocarbon (EPH) analysis of soil and water samples. These high-performing SPE cartridges completely separate aliphatic and aromatic compounds into distinct fractions, and they are guaranteed to produce background levels under the strict reporting limits of MA and NJ EPH methods. Our standard 5 g format cartridges are now joined by 2 g format cartridges made from the same high-quality silica. While the 5 g cartridges are recommended when higher loading capacity is required, the new 2 g cartridges are ideal for automated systems or when time-saving and solvent reduction are desired. As always, our rigorous QC testing and moisture-resistant packaging ensure storage stability and consistent lot-to-lot performance.
Per-and polyfluorinated alkyl substances (PFAS) are often used in tubing and other liquid-contacting parts of an HPLC system, where they can leach into the mobile phase and interfere with sample analysis. This contamination is particularly problematic when analyzing at trace levels, such as at the ppt health advisory levels for drinking water. With many labs analyzing at single-digit ppt levels and striving for sub-ppt level detection, PFAS contamination from HPLC components can prevent accurate identification and quantitation of PFAS in samples. To eliminate this issue, Restek’s new PFAS delay column traps and “delays” system-related PFAS, preventing them from interfering with sample analysis. This delay column is a universal solution that can be used with any type of HPLC or UHPLC system up to 15,000 psi (1034 bar) and with any analytical column (fully porous or superficially porous).
Keep your organochlorine pesticide GCs up and running by protecting them against matrix components with superior sample cleanup. Resprep CarboPrep Plus SPE cartridges surpass traditional Florisil products in cleanup power for sample matrix compounds that cause active sites in GC inlets and columns, degrading pesticides and interrupting work due to failed calibration checks. For CarboPrep Plus cartridges, Restek uses a proprietary treatment to create an exceptionally clean carbon that exhibits consistent selectivity. The end result is a reliable sample preparation product that does not contribute interfering background signal and does not need to be evaluated lot to lot to see if elution volumes need to be adjusted. In addition, CarboPrep Plus cartridges are designed to use the same equipment, solvents, and solvent volumes as a traditional Florisil cleanup procedure, minimizing the impact of switching on sample prep labs while maximizing the performance benefit to analytical labs.
New RAVEqc quick-connect air valves from Restek are a tool-free alternative to bellows/diaphragm valves that reduce the time and variability associated with connecting air canisters to other devices. Standard bellows/diaphragm valves rely on compression fittings to connect air cans to flow controllers, autosamplers, cleaners, and other equipment commonly used to collect and analyze air samples. While compression fittings are tried-and-true, they also require more time and greater skill to ensure the connections are not overtightened, cross threaded, or leaking, which can cause damage, reduce valve lifetime, and result in sample loss.
RAVEqc quick-connect air valves eliminate that risk by providing a means of making the connection and opening the valve in one tool-free, consistent process that means anyone and everyone can successfully use them. Whether you need to replace your existing bellows/diaphragm valves or want the extra security of using two valves in tandem to better protect your samples, RAVEqc quick-connect air valves are a tool-free, easy-to-use option that will make air sampling and analysis much easier.
Versatile radiello passive diffusive air samplers—now available from Restek—feature a unique 3D radial design that provides several performance advancements compared to standard 2D flat axial air samplers. These samplers are a reliable, cost-effective alternative that offers both high sensitivity for low-level detection in short sampling periods (down to 15 min), as well as higher capacity so accurate results can be obtained over longer (30 day) sampling times. Because the radial design results in a higher rate of uptake and larger capacity, radiello air samplers are a versatile solution that allows labs to sample very efficiently for short durations or sample for longer periods without bias from analyte breakthrough or back diffusion. These air samplers are available for a wide range of chemical classes, so the choice of sampling material can be tailored to specific applications. Ideal for labs supporting environmental monitoring, industrial hygiene, and any other ambient (indoor/outdoor) air testing, radiello air samplers from Restek are recommended when a reliable source of versatile, high-performing, easy-to-use air samplers is required.
This new certified reference material (CRM) from Restek contains 20 of the most commonly analyzed residual solvents in one convenient solution. Designed for cannabis labs testing residual solvents by headspace GC, this convenient high-concentration (3000 µg/mL) formulation makes it easy to prepare accurate working standards for various threshold limits. With verified composition and stability, this CRM is manufactured and QC-tested in Restek’s ISO-accredited labs to satisfy your ISO requirements. In stock now and available for immediate shipment.
Restek is pleased to announce the launch of new pesticide residue standards to meet the specific cannabis analysis needs of Oregon—and states with similar pesticide residue regulations/programs. Dissolved in acetonitrile and formulated for stability, the 59 compounds are separated into 6 x 1 mL solutions with individual analyte concentrations of 600 μg/mL—resulting in a convenient 100 μg/mL solution when blended immediately before use. Designed with quality and convenience in mind, this set of standards eliminates the need for in-house standards preparation. Restek’s Oregon pesticide standards are certified reference materials (CRM) manufactured and QC-tested in ISO-accredited labs.
Restek has expanded its line of LC accessories to bring you even more of what you need to keep your LC flowing. Over 140 new items are now available, including fittings, tubing, mobile phase management and safety supplies, and more.
Featured products include bottle top inlet valves to protect your lab from volatile compounds and your mobile phase from bacterial contamination, outlet valves to regulate pressure during helium sparging, and safety exhaust filters with a color indicator to clearly show when a changeout is needed.
Browse top-quality couplers, fittings, unions, tees, and crosses; PEEK and stainless steel tubing; mobile phase maintenance and safety products including bottle tops, valves, filters, and spargers—and that’s on top of our already wide selection of instrument replacement parts and supplies.
Don’t stop at the column; outfit your entire LC system with Restek LC products. Order now at
Analysts have long enjoyed the benefits of Merlin Microseal septa for their traditional and SPME fiber injections—and now, you can switch to these innovative septa for your SPME Arrow applications, too!
The advantages of the Merlin Microseal septum include elimination of septum coring, longer life, and consistently low insertion force for injections. The Microseal septum incorporates two separate sealing mechanisms. These sliding seals eliminate septum coring and the resulting accumulation of septum crumbs in the injection port liner.
The Restek PAL SPME Arrow is a larger-diameter solid phase microextraction (SPME) probe with a rugged construction that ensures longer life, higher sample throughput, and better sensitivity over traditional SPME fibers. The Merlin Microseal for SPME Arrow is available for many popular instruments and both Restek PAL SPME Arrow sizes (1.1 mm and 1.5 mm). Installation is simple, requiring no modification of the injection port; although, due to the relatively large diameter of Restek PAL SPME Arrows, you must install an instrument-specific GC inlet conversion kit from Restek prior to use.
In addition to these new septa for SPME Arrow applications, Restek also offers Merlin Microseal adapter kits and septa for use in general-purpose (3 to 100 psi), low-pressure (1 to 45 psi), and SPME fiber (3 to 100 psi) applications.