共查询到19条相似文献,搜索用时 256 毫秒
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概述了引起海水污染的原因、水质监测的必要性及海水分析方法现状;阐述了固相微萃取样品分析前处理技术的优点,固相微萃取-气相色谱/质谱联用、固相微萃取-液相色谱/质谱联用于海水分析的特性和操作模式;列举了固相微萃取-色谱/质谱联用分析测试水中污染物的国内的一些研究成果。 相似文献
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采用气相色谱-质谱联用法,定性测定了软聚氯乙烯塑料(S-PVC)产生的挥发性气体。结果显示:软聚氯乙烯产生的挥发性气体主要为烃类化合物、醇和醛、酯等羰基化合物,产生气味的化合物是醇和羰基化合物,这些物质可由助剂带入或在塑料加工过程中热氧降解产生。 相似文献
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Huey-Ching K. Chang Ronald J. Skelton Jr. Karin E. Markides Milton L. Lee 《Polycyclic Aromatic Compounds》2013,33(4):251-264
Detailed identification of sulfur-containing polycyclic aromatic compounds (S-PAC) was accomplished for solvent extracts of five different coals. The S-PAC were isolated by ligand-exchange chromatography. Due to the great complexities of these samples, capillary gas chromatography (GC) was employed for their analysis. An element selective radio frequency plasma detector was used to provide sulfur selective detection. Gas chromatography-mass spectrometry was used to identify individual compounds in isolated sulfur fractions. Condensed thiophenic compounds were found to be the major constituents in all five S-PAC fractions. Diaryl sulfides were also detected in the high volatile bituminous Illinois #6 coal. The prevalence of various S-PAC in different coal extracts was observed as a function of their rank. 相似文献
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PFBOA, O-(2,3,4,5,6-pentafluorobenzyl)hydroxylamine, is excellent as a derivatizing agent in the GC determination of carbonyl compounds in ozonated water samples. Surface and waste waters have been ozonated. The carbonyl ozonation by-products were identified as PFBOA derivatives by gas chromatography-mass spectrometry. The main by-products of ozonation identified were formaldehyde, glyoxal, methylglyoxal, and 13 other compounds. The characteristics of the first three compounds with respect to production and decomposition during ozonation are discussed. 相似文献
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