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原子吸收光谱测定银具有灵敏度高,干扰比较少,手续简便、快速的特点。文献直接测定微量银灵敏度不够高,某些离子还有干扰。我们在双硫腙比色测定银和原子吸收测定银的基础上提出用甲基异丁基甲酮萃取原子吸收光谱测定银的方法,提高了灵敏度,消除了某些干扰。实验试荆 1.银标准溶液:称取1,0000克光谱纯银片,溶解于1:1的硝酸中,用无氯离子水冲入1000毫升容量瓶中,稀释至刻度,摇匀。使用时可用20％的氯化钠溶
Atomic absorption spectrometry silver has the characteristics of high sensitivity, less interference, simple and quick procedure. The direct measurement of trace silver sensitivity of the literature is not high enough, some ions also interfere. Based on the determination of silver by dithizone colorimetric method and silver by atomic absorption spectrometry, we proposed a method for the determination of silver by methyl isobutyl ketone extraction atomic absorption spectrometry to improve the sensitivity and eliminate some interferences. Experimental test Jing 1 silver standard solution: Weigh 1,0000 grams of spectral sterling silver film, dissolved in 1: 1 nitric acid, chloride-free water into 1000 ml volumetric flask, diluted to the mark, shake. Use 20% sodium chloride solution can be used