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王瑞斌. 重铬酸钾返滴定法测定岩盐中氯化钠的研究[J]. 科学技术与工程, 2006, (14): 2097-20992107.
.Determination of Sodium Chloride in the Rock Salt through Potassium Dichromate Back-titration[J].Science Technology and Engineering,2006,(14):2097-20992107.
重铬酸钾返滴定法测定岩盐中氯化钠的研究
Determination of Sodium Chloride in the Rock Salt through Potassium Dichromate Back-titration
投稿时间:2006-03-14  修订日期:2006-03-14
DOI:
中文关键词:  重铬酸钾 返滴定法 氯化酰铬 岩盐 氯测定
英文关键词:potassium dichromate back titration chromyl chloride rock salt determination of chloride
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中文摘要:
      研究了采用重铬酸钾返滴定法测定岩盐中的氯化钠。用定量的K2Cr2O7-H2SO4溶液,在加热的条件下与岩盐反应,生成的氯化酰铬蒸发除去后,再用硫酸亚铁铵标准溶液滴定剩余的K2Cr2O7。测定结果的RSD=1.0%,加标回收率R=97.5%~100.2%。结果表明,改进后的测定法准确、快速、干扰小、终点现象明显,是一种既可用于各种可溶性氯化物中氯含量或氯化物含量的测定,也便于准确而快捷地测氯。
英文摘要:
      The method of determining of sodium chloride in the rock salt through potassium dichromate backtitration is studied. A fixed ration of K2Cr2O7-H2SO4 reacts with rock salt under the heating condition, and chromyl chloride is produced. Upon evaporation of the produced chromyl chloride, the standard ammonium ferrous sulfate liquid is used to titrate the rest of K2Cr2O7. The relative standard deviation of determination results is 1.35%, and the recovery rate of add standard is between 97.5%-100.2%. The results show that the improved method is accurate, quick, with little disturbance, and end point to be effective. It is an accurate and fast way of determining chlorides content, which not only can be used to determine the content of chlorine in various dissolvable chlorides, but also can be used in experiments intended more quickly and accurately.
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