Moderate-power helium plasma as an element-selective detector for gas chromatography of dioxins and other halogenated compounds.

Moderate-power helium plasma as an element-selective detector for gas chromatography of dioxins and other halogenated compounds.
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中等功率氦等离子体作为二恶英和其他卤代化合物气相色谱的元素选择性检测器。

DOI:
10.1021/ac00281a016
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发表时间:
1985
影响因子:
7.4
通讯作者:
Caruso,JA
Caruso,JA
中科院分区:
化学1区
文献类型:
--
作者:
Haas,DL;Caruso,JA

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本文介绍了中功率氦微波放电作为卤代化合物气相色谱的元素选择性检测器。等离子体功率和气体流量利用氯化二恶英和农药的混合物进行优化。毫不奇怪,切向流炬可能的最低流量产生最佳灵敏度。与早期的溶液nebullzatlon工作不同,使用的等离子体功率越高,S//V越差。多元素色谱图是在与特定化合物的元素发射相对应的几个波长处测定的。给出了检测限和线性范围。除了定量的重要性,这种技术,元素的比例(导致经验公式),确定了高精度,通过使用离线背景校正方案。在线背景校正方案也是有用的,尽管不如离线方法。当不进行背景校正时,元素比的准确性大大降低.
A moderate-power helium microwave discharge Is characterized as an element-selective detector for the gas chromatography of halogenated compounds. Plasma power and gas flow are optimized utilizing a mixture of chlorinated dioxins and pesticides. Not surprisingly, the lowest flows pos-sible with the tangential flow torch produced the best sensi-tivity. Unlike earlier solution nebullzatlon work, the higher plasma powers utilized led to poorer S//V. Multielement chromatograms are determined at several wavelengths cor-responding to the elemental emission available from specific compounds. Detection limits and linear ranges are presented. In addition to the quantitative Importance of this technique, elemental ratios (leading to empirical formulas) are deter-mined with high accuracy by using an off-line background correction scheme. On-line background correction schemes were also useful although Inferior to the off-line method. When no background correction Is employed, the accuracy of the elemental ratio Is considerably degraded.
使用电感耦合等离子体对气相色谱流出物进行元素分析
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影响因子: 1.3
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