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锌是一种高灵敏度元素,用共振线2138.6(?)测定。测定时,采用空气——乙炔低温焰加热,作了盐酸用量和干扰元素的影响试验,制订了纯铜中锌含量的测定方法,测定范围为十万分之几至万分之几。一、实验部分 (一)仪器和试剂测定仪器为WFD—Y_2型原子吸收分光光度计。用北京真空仪表厂制造的空心阴极灯作辐射源。采用分析纯盐酸,比重1.19(1+1)。过氧化氢采用30％的水溶液。锌标准溶液的配制: 1.称0.1000克纯锌,溶于30毫升(1+1)的盐酸中,冷却后移入1000毫升容量瓶中,用水稀释到刻度,并摇匀。该溶液含锌量为
Zinc is a highly sensitive element measured with the resonance line 2138.6 (?). Determination, the use of air - acetylene low temperature flame heating, hydrochloric acid dosage and interfere with the impact of test elements, developed a determination of zinc content in pure copper, the determination of the range of a few hundred thousandths to a few. First, the experimental part (a) instruments and reagents for the determination of WFD-Y_2 atomic absorption spectrophotometer. Hollow cathode lamp manufactured by Beijing Vacuum Meter Factory as a radiation source. Analytical pure hydrochloric acid, specific gravity 1.19 (1 + 1). Hydrogen peroxide uses a 30% aqueous solution. Zinc standard solution preparation: 1. Weigh 0.1000 grams of pure zinc, dissolved in 30 ml (1 +1) of hydrochloric acid, cooled and transferred to 1000 ml volumetric flask, diluted with water to the mark, and shake. The solution containing zinc content