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| Received:December 10, 2014 Revised:December 31, 2104 |
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| DOI：doi:10.3969/j.issn.2095-1035.2015.02.004 |
| KeyWord:ion chromatography; combustion-hydrolysis; lithium cobalt oxide; chloride |
| Author | Institution |
| YANG Zhaohong |
桂林理工大学化学与生物工程学院，广西 桂林 |
| LI Huachang |
北京矿冶研究总院 测试研究所 北京 |
| SHI Yehong |
北京矿冶研究总院 测试研究所 北京 |
| YU Li |
北京矿冶研究总院 测试研究所 北京 |
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| Abstract: |
| A new method for the determination of chloride in lithium cobalt oxide accurately was developed by, high temperature combustion hydrolysis-ion chromatography. The hydrogen chloride gas is generated by hydrolysis reaction with the sample, oxygen and steam at 1 100 ℃and carried over with carrier gas,. The content of chloride was determined by ion chromatography after the hydrogen chloride gas was received by condensation. The optimized experimental conditions were obtained as follows: a mixed solution of 4.5 mmol/L NaHCO3 and 4.5 mmol/L NaCO3 mixture asa eluent, SH-AG-1 as protect column and SH-AC-1 as separation column. The content of chloride ion in the range of 0.05~5.00 mg/L was linear to the peak area. The detection limit (3s) was 0.010 mg/L. The recovery was 92.0%~96.0% with 3.0%~5.3% RSD’s (n=11).This method has been proved to be accurate for the determination of trace chlorine in lithium cobalt oxide. |
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