原子吸收测定矿石中微量钴镍,一般采用DDTC-MIBK,APDC-MIBK等溶剂萃取体系。这些方法虽对铁锰可以掩蔽,但铁锰高时难以准确定量,铁使结果严重偏高,锰不仅影响萃取,而且萃取物易堵塞喷雾毛细管,使测定难以进行。1-亚硝基-2-萘酚(NNP)与钴镍铜在微氨性介质中都能形成络合物,并溶于醋酸丁酯。在pH为11时,Fe与NNP反应没有DDTC活泼。经反复探索,确定在酒石酸铵存在下,pH=6.8～8.4微氨性介质中 Atomic absorption determination of trace cobalt and nickel ore, the general use of DDTC-MIBK, APDC-MIBK solvent extraction system. Although these methods can mask the iron and manganese, but difficult to accurately quantify iron and manganese is high, the result of iron serious serious, not only affect the extraction of manganese, but also easy to plug the spray capillary, making the determination difficult. 1-Nitroso-2-naphthol (NNP) and cobalt nickel copper in the micro-ammonia medium can form a complex, and soluble in butyl acetate. At pH 11, Fe reacted with NNP without DDTC activity. After repeated exploration to determine the presence of ammonium tartrate, pH = 6.8 ~ 8.4 micro-ammonia medium