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Determination of Trace Anions in High-purity Hydrofluoric Acid by Capillary Ion Chromatography with Column-switching Technique |
Received:July 06, 2012 Revised:July 14, 2012 |
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DOI:doi:10.3969/j.issn.2095-1035.2012.03.0008 |
KeyWord:hydrofluoric acid;column switching method;capillary ion chromatography |
Author | Institution |
XIE Peijin |
浙江省化工研究院有限公司,杭州 |
SUN Jianying |
浙江省化工研究院有限公司,杭州 |
WANG Liemin |
浙江省化工研究院有限公司,杭州 |
YE Mingli |
赛默飞世尔科技有限公司 上海实验室,上海 |
ZHU Yan |
浙江大学 化学系,杭州 |
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Abstract: |
In this paper, a capillary ion chromatography- column switching method was established to determine trace anions in high-purity hydrofluoric acid solutions. All of the sample pretreatment and separation were performed on the newest ICS-5000 (Thermo Fisher) instrument. The RSDs of retention time and peak area were 0.02%~0.12% and 0.63%~1.89%, respectively. And the linear ranges of anions were 1~100 μg/L with correlation coefficients larger than 0.9998. The limits of detection (S/N=3) for Cl-,Br-,NO3-,and PO43- were 2.13 ~32.61 ng/L, and the recoveries for Cl-,Br-,NO3-,and PO43- were 85.3%~103.9%. The method has been applied to analyze trace anions in true sample with satisfactory results. |
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