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锰白铜中镁的测定,过去多采用化学法,操作较繁。本文研究了原子吸收光谱法,用镧作“外加基体”,控制共存元素的干扰,可以不必分离共存元素,不需多种试剂处理,仅用镁的纯水含镧标准溶液制做工作曲线,测定锰白铜中的镁,方法简单而快速。测定的最佳范围是:待测溶液中锰白铜用量为每毫升低于0.8毫克时,镁的含量范围为0.05—1.00微克/毫升。方法的相对标准偏差小于±10％,与化学法比较结果一致。实验 (一)仪器和试剂 1.原子吸收分光光度计: Hilger
Manganese copper determination of magnesium in the past to use more chemical methods, more complex operations. In this paper, atomic absorption spectrometry has been studied. With lanthanum as the “external matrix” to control the interference of coexisting elements, it is not necessary to separate the coexisting elements and do not need a variety of reagent treatments. Only the magnesium standard solution of pure water containing lanthanum is used to make the working curve, Determination of magnesium manganese white copper, the method is simple and fast. The optimum range for the determination is that the amount of manganese and copper in the solution to be tested is less than 0.8 mg / ml and the magnesium content is in the range of 0.05-1.00 μg / ml. The relative standard deviation of the method is less than ± 10%, which is in good agreement with the chemical method. Experiment (A) Instruments and Reagents 1. Atomic Absorption Spectrophotometer: Hilger