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ye mian qu qi qi xiang se pu fa ce ding shui zhong qing hua wu
Pages: 169-177
Year: Issue:  2
Journal: Land & Resources

Keyword:  气相色谱测定氰化物;
Abstract: 取水样于封闭的容器里,注入磷酸盐调节pH值为4—5,再注入氯试剂,振荡2min,使氰化物定量的生成CNCl挥发性气体,并保存在封闭容器里的液面上。在一定温度下,经过0.5h使气液达到平衡,直接取其液面上的气体1ml,用电子捕获检测器气相色谱法测定。此法检测下限为0.3ppb,RSD%为4.87。
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