气相色谱法测定岩溶水中氰化物

Gas Chromatographic Determination of Cyanide in Karst Water

岩溶水中低含量氰化物的测定,应用气相色谱法是一良好的途径。本工作是在酸性溶液下,用溴将氰根转化为CNBr形式,利用电子捕获的高选择性,测定CNBr色谱峰。CN~-在10—10克时获得良好线性。一色谱条件103气相色谱仪,H~3源电子捕获检测器。色谱柱1.5M×4mm玻璃柱。内填401有机担体后在不接检测器.

A rapid and sensitive method for determination of small amounts of cyanide in karst water by gas chromatography was studied.In acidic medium,CNcould be converted into CNBr with bromine,and extracted with benzene.The benzene extract was introduced through the chromatographic column and a fine peak was obtained..A straight line was obtained over the range of 10-11-10-9 gram of cyanide.