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铜合金中锡的测定有重量法和容量法。操作烦复,分析时间长。络合滴定法速度较快,但对含锡量低的合金作快速、准确的测定,仍较困难。比色法测定锡虽有了介绍,如硫酚法,孔雀石绿-硫氰酸盐法,但硫化氢组元素干扰测定不适用于铜合金;桑色素法无需分离,可直接测定,但灵敏度较低。
Determination of tin in copper alloys are gravimetric and volumetric method. Complex operation, analysis of a long time. Complexometric titration method is faster, but the determination of low tin content of the alloy for fast, accurate, still more difficult. Colorimetric determination of tin although there are introduced, such as thiophenol method, malachite green - thiocyanate method, but the hydrogen sulfide group element interference assay does not apply to copper alloy; morin method without separation, but the direct determination of sensitivity Lower.