Special Issues-11-01-20 | LCGC Supplements
Fast Semivolatiles Analysis Harmonized for EPA Methods 625.1 and 8270E Using Supported Liquid Extraction and GC–MS/MS
November 01, 2020
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A supported liquid extraction (SLE) and fast gas chromatography–tandem mass spectroscopy (GC–MS/MS) method, used in multiple reaction monitoring (MRM) mode, was developed for the analysis of semivolatile organic compounds (SVOCs) in environmental samples, according to the updated EPA Methods 625.1 and 8270E. This method requires minimal sample handling and yields significant throughput and productivity gains in the laboratory.
Simultaneous Analysis of Ultrashort-Chain, Alternative, and Legacy PFAS in Potable and Non-Potable Waters
November 01, 2020
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A hybrid HILIC–ion exchange column was used for the analysis of ultrashort-chain per- and polyfluoroalkyl substances (PFAS) compounds in environmental waters. This direct injection LC–MS method enables simultaneous measurement of ultrashort- chain, alternative, and legacy PFAS in potable and non-potable waters.
Evaluating the Goodness of Instrument Calibration for Chromatography Procedures
November 01, 2020
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How good are your calibration procedures for environmental analysis methods using GC or LC? We demonstrate the overall value of a calibration measured by RSD. We also demonstrate the use of relative standard error (RSE) as a way of evaluating the quality or goodness of calibration methods.
Advancing Environmental Analysis: Beyond the First 50 Years of the EPA
November 01, 2020
From the Guest Editor
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An introduction to this special issue by our guest editor.
A Turnkey Protocol for Detecting Taste and Odor Compounds in Drinking and Surface Waters by Gas Chromatography–Mass Spectrometry and Electron Capture Detector (GC–MS/ECD)
November 01, 2020
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A comprehensive monitoring protocol has been developed using GC–MS/ECD in selective ion monitoring (SIM) mode, with injection performed by solid-phase microextraction (SPME) and headspace (HS). This single system has been configured to analyze for all taste and odor (T&O) compounds in Standard Method 2170, with minimal changing of columns, injectors, or SPME fibers between methods.
Method Development for the Qualitative and Quantitative Analysis of Pesticides by Direct Injection Liquid Chromatography– Tandem Mass Spectrometry (LC–MS/MS)
November 01, 2020
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This modification of ASTM method D8026 for pesticides in environmental matrices includes more pesticides and lowers the reporting limits, thus increasing throughput and measurement capacity for a large surface-water monitoring project.