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金属镍、钴中微量锌之测定过去多采用乙酸乙酯萃取分离双硫腙比色法,此法需时较长,操作不便;目前国内一般应用氰化物掩蔽主体元素或者高分子胺萃取分离等手段以改善此法。但前法需用剧毒试剂,而后法需用胺类不仅味嗅且萃取剂的再生使用比较麻烦,同时这类方法均离不了用双硫腙显色,干扰元素较多。在批林批孔运动的推动下,我们重温了伟大领袖毛主席的教导:“……人类总得不断地总结经验,有所发现,有所发明,有所创造,有所前进。”在参阅了有关资
Metallic nickel, cobalt, the determination of trace zinc in the past, the use of ethyl acetate extraction and separation of dithizone colorimetric method, this method takes a long time, inconvenient to operate; currently the general application of cyanide masking elements or polymer amine extraction separation Means to improve this method. However, the former method requires the use of highly toxic reagents, and then the method requires amines not only to smell and extract the regenerative use of the extraneous cumbersome, while such methods are inseparable from the dithizone color, interfering elements more. Driven by the pro-Lin Pok campaign, we revisit the teachings of Chairman Mao, the great leader: “... mankind always needs to constantly sum up his experience, discover something, invent something, create something, and make progress.” In reading The relevant information