Environmental Applications of Gas Chromatography/Atomic Emission Detection

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• 作者：Donald F. Gurka ; Steven Pyle ; and Richard Titus
• 刊名：Analytical Chemistry
• 出版年：1997
• 出版时间：July 1, 1997
• 年：1997
• 卷：69
• 期：13
• 页码：2411 - 2417
• 全文大小：146K
• 年卷期：v.69,no.13(July 1, 1997)
• ISSN：1520-6882

文摘

A gas chromatograph/atomic emission detector (GC/AED) system has been evaluated for its applicability toenvironmental analysis. Detection limits, elementalresponse factors, and regression analysis data were determined for 58 semivolatile environmental contaminants.Detection limits for injected analytes ranged from0.17to 3.0 ng on the hydrogen 486-nm channel, from 1.0 to5.0 ng on the nitrogen 174-nm channel, from 0.65 to11.7 ng on the oxygen 777-nm channel, from 0.071 to3.0 ng on the chlorine 479-nm channel, and from 0.023to 0.038 ng on the sulfur 181-nm channel. Meanelemental response factors (ERFs) measured on thesechannels, relative to the carbon 496-nm channel, werehydrogen, 0.084 (mean %RSD = 6.6); nitrogen, 0.246(mean %RSD = 19); oxygen, 0.459 (mean %RSD = 16);and chlorine, 0.417 (mean %RSD = 3.6). The higherprecision obtained for hydrogen and chlorine, relative tothat for nitrogen and oxygen, is attributed to the abilitytoscan these elemental channels in the same GC run as thecarbon 496-nm channel (diode array wavelength rangelimitation of ~40 nm/run). Mean ERFs of standardcompounds were used to determine the molecular formulas of chlorinated hydrocarbons and chlorinated organosulfur compounds in a contaminated environmentalsoil sample. These formulas are in good agreementwiththe molecular weights and chlorine isotopic data obtainedfrom low-resolution gas chromatography/mass spectrometry.