Rapid Determination of TO-15 Volatile Organic Compounds (VOCs) in Air

Author(s): Jason S. Herrington
Restek Corporation

Published By: Restek Corporation

Year of Publication: 2013

Link: http://www.restek.com/Technical-Resources/Technical-Library/Environmental/env_EVAN1725-UNV

Abstract: The following study evaluated the efficacy of using a Nutech’s 8900DS preconcentrator in combination with an analytical system based on a 30 m x 0.32 mm x 1.00 µm Rxi®-5Sil MS column for analysis of VOCs in whole air. Results were assessed based on five criteria outlined for time-integrated, whole air canister sampling in the United States (U.S.) Environmental Protection Agency’s (EPA) Compendium Method TO-15 (Determination of Volatile Organic Compounds [VOCs] in Air Collected in Specially-Prepared Canisters and Analyzed by Gas Chromatography-Mass Spectrometry [GC-MS]). Canister blank concentrations were <0.2 ppbv; the average relative standard deviation (RSD) of calibration relative response factors (RRFs) was 9.31%; average scan and selected ion monitoring (SIM) method detection limits (MDLs) were 0.06 ppbv and 35.9 pptv, respectively; average replicate precision was 6.86 %RSD; and average analytical accuracy for all 65 targeted TO-15 VOCs was 103%. These performance levels for VOC analysis of air met all Method TO-15 guidelines and were achieved using a 30 m x 0.32 mm x 1.00 µm Rxi®-5Sil MS column with 16.5 minute GC analysis times (~30 min total sample throughput times).

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Sitting Down With a Chromatography Icon: Pat Sandra

Author: Jaap de Zeeuw
Restek Corporation

Published By: Restek Corporation

Year of Publication: 2013

Link: www.restek.com/interview-sandra

Abstract: Restek’s Jaap de Zeeuw sat down for an interview with chromatography icon Pat Sandra. They discussed Professor Sandra’s education and background, his firsthand involvement with advancing the field of chromatography, the founding of Riva, future plans for his new company PaSaTiempo, and much more.

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 www.restek.com/megamix