combustion-hydrolysis-IC Determination of Chloride in lithium cobalt oxide
Received:December 10, 2014  Revised:December 31, 2014
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KeyWord:IC; combustion-hydrolysis; lithium cobalt oxide;chloride
           
AuthorInstitution
Yang Zhao-hong 桂林理工大学化学与生物工程学院
Li Hua-chang 北京矿冶研究总院
Shi Ye-hong 北京矿冶研究总院
Yu Li 北京矿冶研究总院
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Abstract:
      In order to determine trace amounts of chloride in lithium cobalt oxide accurately,a determination method by using ion chromatography combined with pretreating the samples with combustion-hydrolysis was established.The sample hydrolysis reaction with oxygen and steam at 1100 ℃ high temperature.generate hydrogen chloride out with the carrier gas, condensation and receive,Used ion chromatography to determine the content 4.5 mmol/ L NaHCO3 and 4.5 mmol/ L NaCO3 mixture as the eluent, passed SH - AG - 1 to protect column and SH - AC - 1 separation column to separated and detected.The chloride ion in 0.05-5.00 mg/L concentration range, We found the concentration had a linear relation with the peak area, the detection limit (3s) was 0.010 mg/L.Giving values of recovery in ranges of 92.0 %-96.0 % .RSD’s(n=11)in ranges of 2.97 %-5.31 % .This method can accurate determination trace amounts of chlorine in lithium cobalt oxide.
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