我矿试验了“四乙烯五胺-半胱氨酸-三乙醇胺”掩蔽铁、铝及其它重金属离子,不经分离,直接滴定镍矿石、镍精矿及冶炼炉渣的钙、镁,取得了初步成效。通过几年的生产实践,证明该法具有快速、准确、重现性好等优点。方法也原则上适用于铜矿石、铁矿、钒钛共生矿、其它有色金属矿石及其冶炼炉渣的钙、镁分析。 I tested the “tetraethylene pentamine - cysteine ​​- triethanolamine” masking iron, aluminum and other heavy metal ions, without separation, direct titration of nickel ore, nickel concentrate and smelting slag calcium and magnesium, has achieved initial Effective. After several years of production practice, it proves that the method has the advantages of fastness, accuracy and good reproducibility. In principle, the method is also applicable to the analysis of calcium and magnesium in copper ore, iron ore, vanadium-titanium symbiotic ore, other non-ferrous metal ores and their smelting slag.