Analysis of chromium in natural waters by gas chromatography
Analysis of chromium in natural waters by gas chromatography
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气相色谱法分析天然水中的铬
DOI：
10.1021/es60112a004
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发表时间：
1976
影响因子：
11.4
通讯作者：
G. Lee
中科院分区：
文献类型：
--
作者：
R. Lovett;G. Lee
本文建立了用气相色谱法测定天然沃茨中铬的分析方法。铬与HTFA螯合，螯合物被萃取到苯中。使用电子捕获检测器将浸提液注入气相色谱仪中。检测限为0.1 pg/l。天然沃茨中铬的测定方法是研究铬的真实行为及其低水平生理效应的基础。通常的含水铬分析方法，原子吸收和紫外可见分光光度法在极低的铬水平下通常是不可行的。即使经过复杂的修改，总铬的最乐观检测限也是0.5 pg/l。在螯合剂上预浓缩后使用X射线荧光
An analytical method for the determination of chromi-um in natural waters by gas chromatography techniques has been developed. The chromium is chelated with HTFA and the chelate is extracted into benzene. The extract is in-jected into a gas chromatograph using an electron capture detector. A detection limit of 0.1 pg/l. was found for chro-mium in natural water samples.An accurate method for the determination of chromium in natural waters is essential if the true behavior of the element and its low level physiological effects are to be stud-ied. The usual methods of aqueous chromium analysis, atomic absorption and uv-visible spectrophotometry are not generally feasible at extremely low chromium levels. Even with sophisticated modifications, the most optimistic limit of detection of total chromium is 0.5 pg/l. using X-ray fluorescence following preconcentration on a chelating