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偶氮氯瞵Ⅰ是分光光度法测镁的较好的显色剂之一,已用于铝合金、锌合金和球墨铸铁中镁的直接光度测定,本文在前人工作基础上,,进一步试验用于测定快速镀铬液中的镁,镀液中主要成份CrO_4~(2-)不干扰镁的测定,其它微量杂质离子可加入适当的掩蔽剂消除其干扰,从而拟定了测定镀铬液中镁的直接光度法,方法较原来的EDTA络合滴定法简便快速、重现性好。分析步骤吸取1毫升镀铬液于200毫升烧杯中,
Chloroazo Ⅰ is one of the better chromogenic reagents for spectrophotometric determination of magnesium, which has been used for the direct spectrophotometric determination of magnesium in aluminum, zinc and ductile iron. Based on the previous work, this paper further tests For the determination of rapid chromium plating solution of magnesium, the main component of the bath CrO_4 ~ (2-) does not interfere with the determination of magnesium, other trace impurities can be added to the appropriate masking agent to eliminate interference, which developed a determination of magnesium in the chromium plating solution Direct spectrophotometry, the method than the original EDTA complexometric titration method is simple and rapid, reproducible. Analysis steps Draw 1 ml of chrome plating solution in a 200 ml beaker,