| 引用本文: | 严瑾,胡恩宇.离子色谱法测定水中亚硫酸根的优化[J].环境监控与预警,2023,15(4):63-67 |
| YAN Jin,HU Enyu.Determination Optimization of Sulfite in Water by Ion Chromatography[J].Environmental Monitoring and Forewarning,2023,15(4):63-67 |
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| 摘要: |
| 为了提高离子色谱法测定水中亚硫酸根的准确性，通过条件实验，对亚硫酸根稳定性、淋洗液有机改进剂等进行优化。选择Metrosep A Supp 5-150色谱柱，以3.2 mmol/L 的碳酸钠+1.0 mmol/L的碳酸氢钠+5.0%的丙酮溶液为淋洗液，经离子色谱检测，亚硫酸盐的质量浓度在0～10.0 mg/L范围内与色谱峰面积线性关系良好，检出限为0.034 mg/L。实际样品测定结果的相对标准偏差为2.4%～4.7%，加标回收率为96.8%～103%。该方法可延长亚硫酸盐标准溶液的保存时间，有效分离亚硫酸根和硫酸根，灵敏度高、正确度与精密度良好，适用于水中亚硫酸根的测定。 |
| 关键词: 离子色谱 亚硫酸根 保存时间 淋洗液 有机改进剂 |
| DOI：10.3969/j.issn.1674-6732.2023.04.010 |
| 分类号:X832 |
| 基金项目:江苏省环境监测科研基金项目（1807） |
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| Determination Optimization of Sulfite in Water by Ion Chromatography |
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YAN Jin， HU Enyu
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Nanjing Environmental Monitoring Center of Jiangsu Province，Nanjing，Jiangsu 210013，China
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| Abstract: |
| In order to improve the accuracy of the determination of sulfite in water by ion chromatography， the stability of sulfite and the organic modifiers were optimized through conditional experiments. A Metrosep A Supp 5-150 column was selected， and 3.2 mmol/L Na2CO3+1.0 mmol/L NaHCO3+5.0% CH3COCH3 was used as eluent. The mass concentration of sulfite has a good linear relationship with the chromatographic peak area in the range of 0~10.0 mg/L， and the detection limit is 0.034 mg/L. The relative standard deviations of the actual sample were 2.4%~4.7%， and the spike recoveries were 96.8%~103%. This method can prolong the storage time of sulfite standard solution， effectively separate sulfite and sulfate， and has the advantages of high sensitivity， good accuracy and precision. |
| Key words: Ion chromatography Sulfite Preservation time Eluent Organic modifier |
