Now Available for SPME Arrow: The Longer Life and Simplicity of Merlin Microseal Septa

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.

Order your Merlin Microseal septa today at
You can also learn more about Restek’s full line of SPME products at

New UHPLC Guard Cartridges Deliver Ultimate Protection for Restek’s 1.8 μm Raptor Columns

Raptor 1.8 μm LC columns unleashed superior Raptor performance on UHPLC analyses, and now Restek has released EXP UHPLC guard column cartridges made specifically for Raptor 1.8 μm columns.

These new guards provide extreme protection from particulates and matrix contamination, extend the lifetime of already rugged and long-lasting Raptor columns, and are proven to withstand the same UHPLC pressures as their analytical column counterparts. UltraShield filters are available for filtering out particulates, minimizing extra column volume, and maximizing sample throughput when using SPE, SLE, or other extensive sample preparations—but new Raptor EXP UHPLC guard column cartridges are an especially valuable alternative when using dilute-and-shoot or other minimal sample preparation techniques.

Further extend the life of your 1.8 μm Raptor UHPLC columns today at

New MOSH/MOAH Retention Time Standard Ensures Easy, Accurate Integration

Restek is pleased to announce the launch of a new standard formulation that was developed specifically for methods that couple LC with GC-FID to determine mineral oil hydrocarbon contaminants that migrate from processing equipment and packaging into food. This 10-component mix contains both mineral oil saturated hydrocarbon (MOSH) and mineral oil aromatic hydrocarbon (MOAH) markers that are used to accurately identify GC retention time limits for integration. The new standard complements an existing Restek mix that is used to correctly cut the LC fractions for subsequent GC-FID analysis. Both standards are certified reference materials (CRM) manufactured and QC-tested in ISO-accredited labs.

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Same Separation, Speedier Solution

GC Accelerator Oven Insert Kit Product PhotoDesigned with GC-MS users in mind, the GC Accelerator kit provides a simple way to speed up sample analysis. By reducing oven volume, these inserts allow faster ramp rates to be attained, which reduces oven cycle time and allows for increased sample throughput and more capacity to process rush samples. When faster ramp rates are used, existing methods can be accurately scaled down to smaller, high-efficiency, narrow-bore columns using Restek’s EZGC method translator. With a scaled-down column, a properly translated method, and a GC Accelerator kit, you can obtain the same chromatographic separation—often with greater sensitivity—in a fraction of the time without making a capital investment.

Q-sep Extraction Salts Make QuEChERS Even Easier

For years, the QuEChERS approach has made sample preparation faster and easier than traditional methods. Now, the new Q-sep extraction salts from Restek make an easy technique even simpler. Restek’s new, improved design provides the salts in a more granular form, so they flow freely and are easier to pour than powders. The convenient slim packets are easy to open and fit perfectly into extraction tubes, ensuring complete transfer without any spills. These new extraction salts offer the same technical performance you’ve come to expect from the Q-sep line of QuEChERS products, just redesigned for your convenience. Keep your workflow running smoothly with new Q-sep extraction salts from Restek!

Restek Unleashes Superior Raptor Performance on Your UHPLC Analyses — Now with 1.8 μm Particles

Raptor LC columns have been providing higher efficiencies, faster analyses, and rock-solid reliability to HPLC users for several years.

And they have just evolved again.

Restek has brought the benefits of Raptor columns to those who have made the leap to UHPLC instruments, yet are still looking to boost their efficiencies further. Already sold with 2.7 and 5 μm superficially porous particles (SPP), Raptor columns are now available with 1.8 μm particles specifically for use with UHPLC. Choose from four distinctive Restek phase chemistries: Biphenyl, ARC-18, C18, and FluoroPhenyl.

Raptor 1.8 μm columns are designed and QC tested for maximum lifetime under UHPLC pressures. And, because they are Raptor SPP LC columns, they offer the peak capacity, selectivity, and reproducibility that analysts have learned to depend on from Restek.

Outfit your UHPLC with evolutionary Raptor 1.8 μm columns today at

About Raptor SPP LC Columns:
Superficially porous particles (commonly referred to as SPP or “core-shell” particles) changed the world of LC by dramatically boosting column efficiency and reducing analysis times, but they were only the beginning. With Raptor LC columns, Restek chemists have combined the speed of SPP with the resolution of highly selective USLC technology. This new species of chromatographic column allows you to more easily achieve peak separation and faster analysis times without expensive UHPLC instrumentation. Raptor LC columns provide the practicing analyst with the most powerful tools available for fast, efficient method development and increased sample throughput. And, because they are from Restek, Raptor LC columns are backed by manufacturing and quality systems you trust along with internationally renowned Plus 1 service.

New, Multicomponent Class 3 Residual Solvents Standards

Preparing multisolvent reference standards for USP <467> Class 3 residual solvents analysis can be costly, time-consuming, and a source of variation. You can simplify standard preparation significantly and reduce variability by using new, multicomponent Class 3 residual solvents standards from Restek. These new formulations are the only premixed Class 3 reference standards available, and their verified composition and stability bring confidence and consistency to residual solvents analysis. Pair Restek’s new Class 3 standards with our full line of USP <467> standards, GC columns, accessories, and sample vials for a complete residual solvent testing solution.

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New Reference Standards for Accurate trans Fat Determination

trans fats reference standards imageryGrowing concern about the impact of partially hydrogenated oils on human heart health makes accurate data on trans fat content in foods critical for protecting consumers. New reference standards from Restek help you ensure that your lab is generating accurate results. In addition to a derivatization agent, we also offer internal and calibration standards of verified composition and stability. Paired with an Rt-2560 GC column, these new reference standards help ensure accurate determination of trans fat content in foods and edible oils, and they are suitable for AOAC and AOCS methods.

Struggling with EtG/EtS matrix interferences?

A Raptor EtG/EtS column is your solution! Typical methods for EtG and EtS analysis have several limitations: poor resolution from matrix components, long run times that limit sample throughput, and short column lifetimes. Restek has developed a new Raptor EtG/EtS column that consistently retains and resolves EtG and EtS from matrix interferences, providing accurate, reliable results injection after injection. Reliable performance and long column lifetime make this column ideal for alcohol consumption monitoring by high-throughput labs. Paired with Restek reference standards and our fast, 4-minute, dilute-and-shoot LC-MS/MS method, the Raptor EtG/EtS column allows you to analyze EtG/EtS samples with confidence.

Restek chemists became the first to combine the speed of superficially porous particles (also known as SPP or “core-shell” particles) with the resolution of highly selective USLC technology. This new breed of chromatographic column allows you to more easily achieve peak separation and faster analysis times without expensive UHPLC instrumentation. Learn more about Raptor LC columns at

Save time and increase certainty with Restek’s definitive EtG/EtS method, a Raptor EtG/EtS column, and our quality reference standards!

Add the Performance of Restek’s RAVE Valves to Your Entech Air Cans

Restek Air Valve Excellence (RAVE) is now available for the easy retrofit of 3.2 L, 6 L, and 15 L Entech air sampling canisters. These new RAVEn valves have an identical internal design to the incredibly popular and rugged RAVE valves recently released on Restek’s SilcoCan, TO-Can, and miniature air sampling canisters. Upgrade from your TOV and TOV-2 valves—with no modification needed!

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About RAVE Valves

Restek Air Valve Excellence (RAVE) brings proven long life, leak-free performance, and effortless operation to your air sampling canisters. This durable design has been engineered to exceed 15,000 cycles—and every valve is leak-tested with helium to 1×10-6 mL/sec before it leaves our facility. The W-type valve seats are work-hardened to enhance damage resistance, while the wetted surfaces contain no moving parts. And because convenient, reliable field use isn’t just about withstanding the rigors of harsh environments, the RAVE valve achieves full closure with a quick twist of the fingers (only 10 in-lb) and is easy to access, even for big hands or when wearing bulky gloves.

Standard on Restek’s full line of SilcoCan, TO-Can, and miniature air sampling canisters, these American-made valves are also ideal for upgrading existing canisters. Rugged stainless steel RAVE valves can be ordered with Siltek treatment for added inertness and either 2 or 3 ports to accommodate an optional gauge. Plus, diaphragm rebuild kits are available to further extend the life of these long-lasting air valves. Turn to your trusted partner for air sampling and chromatography—order Restek Air Valve Excellence for your air sampling canisters today.