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| Pretreatment and Determination of Thiocyanate Pollutant in Whole Milk Powder by Ion Chromatography/Conductivity Detection |
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| DOI：10.3969/j.issn.1004-4957.年份.月份 |
| KeyWord:thiocyanate milk powder ion chromatography conductivity detection food safety |
| Author | Institution |
| 张水锋，林珍珍，陈小珍，张东雷，王立世 |
1.浙江省质量技术监督检测研究院;2.浙江工业大学化学工程与材料学院;3.华南理工大学化学与化工学院 |
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| Abstract: |
| A method was developed for analysis of thiocyanate（SCN-） pollutant in milk powder samples on an IonPac AS19 column using KOH gradient elution-ion chromatography/conductivity detection with a conductivity suppressor.The experimental conditions，including sample preparation，chromatographic conditions，were investigated. Under the optimal conditions，the calibration curve was linear in the range of 002-100 mg/L，with correlation coefficient（r） of 0.999 9.The limit of quantitation（LOQ，S/N=10） was 0.3 μg/g.The recoveries were in the range of 99%-102%.The method was reproducible，and the inter-RSD（n=7） for peak areas was 1.6% in the random detection of 2.0 mg/L standard solution in 3 d. |
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