Pyrolysis–gas chromatographic atomic emission detection for sediments, coals and other petrochemical precursors
Pyrolysis–gas chromatographic atomic emission detection for sediments, coals and other petrochemical precursors
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沉积物、煤炭和其他石化前体的热解-气相色谱原子发射检测
DOI：
10.1039/ja9920700979
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发表时间：
1992
影响因子：
3.4
通讯作者：
I. Ericson
中科院分区：
文献类型：
--
作者：
J. Seeley;Yadi Zeng;P. Udén;T. Eglinton;I. Ericson
介绍了一种用于海洋沉积物、煤和其它非均质固体样品的在线快速热解-毛细管气相色谱联用技术。氦微波诱导等离子体用于原子发射光谱法的色谱检测。采用光电二极管阵列检测器实现多元素同时检测。气相色谱原子发射检测器的光路用氦气吹扫，允许同时灵敏地检测来自硫181 nm、磷186 nm、砷189 nm、硒196 nm和碳193 nm的原子发射。对若干沉积物和煤样品的碳、氮、硫、氧、磷、砷和硒含量进行了分析。指示样品中这些元素的产状和分布的定性信息可用于衡量样品的成岩演化的相对阶段，并提供关于其沉积环境的信息。在某些情况下，通过在线烷基化改进热解产生的化合物的色谱行为。通过向热解探针中加入液体试剂或向固体样品中加入固体试剂或将试剂填充在色谱仪的进样口中来实现这种在线衍生。
On-line flash pyrolysis coupled to a capillary gas chromatograph for the characterization of marine sediments, coals and other heterogeneous solid samples is described. A helium microwave-induced plasma is used for chromatographic detection by atomic emission spectrometry. Simultaneous multi-element detection is achieved with a photodiode array detector. The optical path of the gas chromatographic atomic emission detector is purged with helium, allowing simultaneous, sensitive detection of atomic emission from sulfur 181 nm, phosphorous 186 nm, arsenic 189 nm, selenium 196 nm and carbon 193 nm. Several sediment and coal samples have been analysed for their carbon, nitrogen, sulfur, oxygen, phosphorous, arsenic and selenium content. Qualitative information indicating the occurrence and distribution of these elements in the samples can be used to gauge the relative stage of diagenetic evolution of the samples and provide information on their depositional environment. In some instances the chromatographic behaviour of the compounds produced upon pyrolysis is improved through on-line alkylation. This on-line derivatization is achieved by adding liquid reagents to the pyrolysis probe or by adding solid reagents either to the solid sample or by packing the reagent in the injection port of the chromatograph.