AL
The second-generation model 5383 PFPD from O.I. Analytical boasts a tenfold improvement in detection sensitivity for sulfur (<1 pg/sec) and phosphorus (<100 fg/sec). Most PFPDs are used to detect sulfur- or phosphorus-containing analytes—the 5383 can detect both in the same run. Applications include the assay of fragrances and essential oils, which often contain sulfurous analytes, and assay of pesticide residues.
Model 5383 can be configured to detect 26 more elements, including tin, gallium, arsenic, nickel and vanadium, which are important in electronics manufacturing and material science. The detector has been designed to be self-cleaning, which reduces maintenance needed for coke removal.
Methanizer for pesticide residues Activated Research Company (Eden Prairie, Minn.) introduced the Polyarc Reactor, a microreactor that integrates into existing GC/FID systems after the column outlet (prior to the FID inlet) and sits on the top of a GC. The Polyarc catalytically combusts and then hydrogenates all carbons in organic compounds to methane. Since the reactor converts all carbon compounds to methane molecules, the FID response factor is 1.0 for all organic compounds. Similar to a traditional FID, reduced noncarbon com- pounds pass through the FID and are not seen. In one experiment, using methanol as the internal standard, the response factors for all analytes were 1.0 ± 0.04. The mean deviation between the response factors and unity was 1.8%.1
Larger deviations can indicate instrument malfunction, such as contaminated injection port liners or inlet discrimination.
Figure 1 – This data shows the linearity obtained from a >5-point calibration curve (0.01–0.5%) for water on Watercol 1910. (Image courtesy of MilliporeSigma.)
GC columns MilliporeSigma (Billerica, Mass.) extended its ionic-liquid polar-GC column phase range with the SLB-IL111i, SLB-IL76i and SLB-IL60i. The SLB-IL111i is the most polar of the series, which gives the most unique elution patterns,
Easy with GC Watercol™
Columns to Measure Water
A sharp water peak shape allows Linear Response, Great Sensitivity, Reproducibility.
sigma-aldrich.com/watercol Get applications, product information, real-time
availability, and ordering information at
©2016 Sigma-Aldrich Co. LLC. All rights reserved. SIGMA-ALDRICH and SUPELCO are trademarks of Sigma-Aldrich Co. LLC, registered in the US and other countries. Solutions within and Watercol are trademarks of Sigma-Aldrich Co. LLC. Sigma-Aldrich Corp. is a subsidiary of Merck KGaA, Darmstadt, Germany.
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AMERICAN LABORATORY
17
MAY 2016
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