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本文在银膜电极阴极溶出法测定水中硫化物的基础上研究了Cl~-的测定方法。以半径为1.2毫米的玻炭球银膜电极为工作电极的阴极溶出法可检出0.1微克/50毫升氯离子,在0.1—5.0微克/50毫升氯离子范围内波高与浓度成正比,回收率在95—110%之间。本法适用于环境降水及高纯水中氯根的测定。仪器装置与试剂玻炭球银膜电极、铂丝辅助电极、银-氯化银参比电极(外套0.1M硝酸钾盐桥);75-4B快速极谱仪,磁力搅拌器,秒表;氯化钠标准溶液:称取0.1648克600℃灼烧过的氯化钠溶解于水并定容至100毫升,此溶液1毫升含0.1毫克氯,用前再稀释成每毫升含1微克氯。分析步骤取50毫升试液于100毫升烧杯中,加入25毫升2M硝酸钾溶液,放入搅拌磁芯,开动搅拌器并插入“三电极”,在+0.4伏沉积1分钟,静止半
In this paper, silver chloride electrode cathodic dissolution method for the determination of sulfide in water based on the determination of Cl ~ -. The chloride ion of 0.1 microgram / 50 ml can be detected by the cathodic stripping method using the glassy silver membrane electrode with a radius of 1.2 mm as the working electrode. The wave height is proportional to the concentration in the range of 0.1-5.0 micrograms / Between 95-110%. This law applies to environmental precipitation and determination of chloride in high purity water. Equipment and reagents Glass ball silver membrane electrode, platinum wire auxiliary electrode, silver - silver chloride reference electrode (jacket 0.1M potassium nitrate bridge); 75-4B rapid polarography, magnetic stirrer, stopwatch; chlorination Sodium standard solution: Weigh 0.1648g of 600 ℃ burning sodium chloride dissolved in water and set the volume to 100 ml, this solution 1 ml containing 0.1 mg of chlorine, before use and then diluted to 1 ml of chlorine per ml. Analysis step Take 50 ml of the test solution in a 100 ml beaker, add 25 ml of 2M potassium nitrate solution into a stirred magnetic core, start the stirrer and insert the “three-electrode”, deposit at +0.4 V for 1 minute, still half