金属铝及合金中少量锌的测定方法很多,一般都采用硫氰酸汞铵重量法,但此法复杂,需时间很长。比色法测定时,一般采用在微硷性中用打萨腙——氯仿萃取;甲基紫(或玫瑰精 C)和硫氰酸盐法。这些方法对试剂纯度要求严格,分离手续也复杂,重现性差。曾应用酸性铬深蓝为指示剂络合滴定锌。王景义等提出在微酸性溶液中用 Determination of a small amount of metal aluminum and aluminum in many ways, generally using ammonium thiocyanate ammonium gravimetric method, but this method is complex and takes a long time. Colorimetric determination, the general use of the micro-alkaline in the use of zisha hydrazone - chloroform extraction; methyl violet (or rose essence C) and thiocyanate method. These methods require stringent reagent purity, separation procedures are complex, poor reproducibility. Acid chromium cyanine used as indicator complex titration zinc. Wang Jingyi put forward in a slightly acidic solution used