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氰化物在水体中以多种形式存在,主要是简单氰化物和络合氰化物,简单氰化物包括HCN、KCN、NaCN、NH4CN等,简单氰化物易溶于水,剧毒[1]。络合氰化物的毒性虽然比简单氰化物的小,但在水体中受pH、温度、日光照射等影响,能分解为简单氰化物[2],也能引起饮用水急性中毒。目前测定生活饮用水中的氰化物主要采用异烟酸-吡唑啉酮分光光度法和异烟酸-巴比土酸分光光度法[3]。前者显色剂吡唑酮的配制需要用到N,N
Cyanide exists in many forms in the water, mainly simple cyanide and complex cyanide, simple cyanide, including HCN, KCN, NaCN, NH4CN, etc., simple cyanide soluble in water, highly toxic [1]. Cyanide complex toxicity than simple cyanide, but in the water by pH, temperature, sunlight exposure, can be decomposed into simple cyanide [2], can also cause acute drinking water poisoning. At present, the determination of cyanide in drinking water mainly uses isonicotinic acid-pyrazolone spectrophotometry and isonicotinic acid-barbituric acid spectrophotometry [3]. The former reagent pyrazolone preparation needs to use N, N