Method for eliminating Fe2+ interference in detection of Zn content

Application Number: 00110858
Application Date: 2000.01.25
Publication Number: 1264041
Publication Date: 2000.08.23
Priority Information:
International: G01N31/16
Applicant(s) Name: Ji Sheng
Inventor(s) Name: Ji Sheng;Jia Chenglu;Shang Zhaocong
Patent Agency Code: 00000
Patent Agent:
Abstract A method for eliminating the Fe2+ ions interference in adetermining Zn content in the mixture of zinc sulfate and ferrous sulfate includes such steps as using 3% H2O2 to oxidize Fe2+ into Fe3+, heating to remove excess H2O2, dripping 20% H2SO4 solution to remove precipitate, using NaF solution to shielf Fe3+, using standard EDTA titration solution in weak-acidic solution where pH is 5.5 and xylenol orange is used as indicator to titrate, and calculating zinc content based on the loss of EDTA.