QUANTITATIVE METHOD OF TRACE CALCIUM CONCENTRATION IN AQUEOUS SOLUTION

申请公布号：JP2016156765(A)

申请号：JP20150036282

申请日期：2015.02.26

申请公布日期：2016.09.01

申请人：

OSAKA SODA CO LTD

发明人：ASHIDA YOSHINORI;HIEDA MASATO;SUGIMOTO TSUTOMU

分类号：G01N31/00;G01N31/22

主分类号：G01N31/00

摘要：PROBLEM TO BE SOLVED: To provide a quantitative method that can easily and rapidly measure the concentration of a trace calcium component included in an aqueous solution at the occurrence site without requiring a large-sized and expensive dedicated device, does not deteriorate the peripheral environment, and has a high safety.SOLUTION: A measurement method of measuring trace calcium in an aqueous solution for chloride alkaline electrolysis includes: a process (A) of performing absorptiometry by bringing a calcium concentration measurement liquid containing an indicator for chelate titration into contact with an aqueous solution to be measured; and a process (B) of performing absorptiometry using, as a blank aqueous solution, the indicator for chelate titration including an acetic acid type chelating agent in a salt water used for chloride alkaline electrolysis, and calculating the calcium concentration included in the aqueous solution to be measured.SELECTED DRAWING: None

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