New Resprep Polymeric SPE Offers an Alternative to Silica-Based Sorbents

Restek has expanded its line of Resprep solid phase extraction (SPE) products with the addition of polymeric sorbents, available in both cartridges for high loading capacity and 96-well plates for high throughput and automation.

Because Resprep polymeric SPE products feature a silica-free, bonded polymeric material, there are no unwanted secondary silica interactions, even with basic compounds. Their high surface area means a higher loading capacity compared to silica sorbents, and their stability over a wide pH range (0–14) means they won’t hydrolyze under extreme conditions. New Resprep polymeric SPE cartridges and 96-well plates are water-wettable, allowing for streamlined conditioning and equilibration steps to drastically reduce solvent usage and sample prep time. And they are not flow-rate dependent, so they maintain retention and capacity after conditioning, even if dried out from vacuum or positive pressure flows.

Resprep polymeric SPE products offer five distinct packings to choose from. Find them all, and the entire line of Resprep sample preparation products, at www.restek.com/resprep

Remove Both Phospholipids and Proteins in One Resprep PLR SPE Procedure

Simultaneously remove phospholipids and proteins in a single, simple procedure with new Resprep PLR (phospholipid removal) SPE products. Whole blood, serum, and plasma all contain proteins and phospholipids that can interfere with target analytes and hasten the need for instrument maintenance. It’s important to remove them from samples prior to analysis to avoid signal suppression, and Resprep PLR SPE cartridges or 96-well plates make this an easy task by combining protein precipitation and phospholipid removal in one sample preparation process. No analyte-specific method development is required because the same procedure can be used for samples containing acids, bases, or neutral compounds. In addition, effective removal of phospholipids and proteins from sample extracts reduces contamination, minimizing the frequency of instrument maintenance.

www.restek.com/PLR

Resprep EPH Fractionation SPE Cartridges: Now Available in a 2 g Format

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.
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Keep Your Instrument Up and Running with CarboPrep Plus SPE Cartridges

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.
www.restek.com/CarboPrepPlus

Method-Specific Sample Preparation for EPH Analysis

resprep_eph_crmChoose New and Improved Resprep SPE Cartridges for Complete Extractable Petroleum Hydrocarbon Fractionation

Resprep EPH fractionation SPE cartridges offer method-specific performance
for extractable petroleum hydrocarbon (EPH) analysis of soil and water samples. These new and improved solid phase extraction (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. In addition, rigorous QC testing and moisture-resistant packaging ensure storage stability and superior lot-to-lot reproducibility.
Restek’s latest expansion of the Resprep sample preparation line is manufactured in a strictly controlled environment with the simple goal of giving you consistent results—every day, every time. Turn to Resprep SPE cartridges for easy, reproducible, and guaranteed extractable petroleum hydrocarbon analysis.
Order yours today at www.restek.com/resprep

Protein and Particulate Removal That’s Fast, Painless, and Effective

Resprep PPT3 CRMRestek’s line of Resprep® sample preparation products has expanded to include 96-well protein precipitation (PPT) plates. New Resprep® PPT3 96-well plates offer highly efficient protein removal with built-in, drip-free membrane and 3-way versatility for filtration, so you can prepare serum, plasma, and other biological samples using the name you have long trusted for quality, cleanliness, and performance.

Resprep® PPT3 96-well plates offer consistently greater than 99% protein removal and drip-free, in-well protein precipitation for a minimum of 24 hours—with no fear of backflushing or contamination. A dual-layer membrane with different porosities in each layer prohibits clogging and speeds up filtration, and using our recommended solvent-first method streamlines sample preparation even further.

Resprep® PPT3 96-well plates are also incredibly versatile. The 2.0 mL deep wells are suitable for mixing by vortex or pipette, and these 96-well plates can be used to increase throughput in general filtration applications. Best of all, PPT3 96-well plates are compatible with all common filtration devices: vacuum manifold, positive pressure manifold, and centrifugation.

Order your Resprep® PPT3 96-well plates today at www.restek.com/PPT3