论文部分内容阅读
在炼焦、炼油、电镀、选矿、合成氨、金属冶炼等废水中往往含有氰化物。氰化物具有剧烈的毒性,在水体中含量为0.01毫克/升时,对鱼类就有中毒作用,含量达0.3毫克/升则影响水体中生物净化作用。因此对上述废水中,氰含量的测定具有极其重要的意义。氰化物的测定,一般采用容量分析法和比色法。为了减少干扰,试液需要蒸馏分离,操作条件严格,手续麻烦。离子选择性电极用于焦化废水中氰的测定已获得成功。在电镀工业中,近年来尽管推广无氰电镀,由于生产条件等还存在一定问题,目
In coking, oil refining, electroplating, mineral processing, ammonia, metal smelting and other wastewater often contain cyanide. Cyanide has a violent toxicity, in the water content of 0.01 mg / L, the poisoning effect on fish, the content of 0.3 mg / L will affect the biological purification of water. Therefore, the above-mentioned wastewater, the determination of cyanide content is extremely important. Cyanide determination, the general use of capacity analysis and colorimetry. In order to reduce interference, the test solution needs distillation separation, the operating conditions are strict and the procedures are troublesome. Ion selective electrode for coking wastewater determination of cyanide has been successful. In the electroplating industry, despite the promotion of non-cyanide electroplating in recent years, due to the production conditions there are still some problems, the head