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氰化物的测定过去多用吡啶—联苯胺法,吡啶—吡唑啉酮法,异烟酸—吡唑啉酮法以及毗啶—巴比妥酸法等。但都由于联苯胺的致癌性,吡啶有恶臭,试剂不稳定,或需使用有机溶剂二甲基甲酰胺而感到不足。这往往给操作者带来不便,因而不易推广使用。本文介绍异烟酸钠—巴比妥酸钠法,既克服上述缺点又能达到应有的灵敏度。
The determination of cyanide in the past with pyridine - benzidine method, pyridine - pyrazolone method, isonicotinic acid - pyrazolone method and pyridine - barbituric acid method. However, both of them are insufficient due to the carcinogenicity of benzidine, the malodour of pyridine, the instability of reagents, or the use of the organic solvent dimethylformamide. This often brings inconvenience to the operator, which is not easy to promote use. This article describes sodium isonicotinate - barbital sodium method, both to overcome the above shortcomings and achieve the appropriate sensitivity.