| 黄志芬1，2，3，李循媛1，2，3，伦麒景1，2，3.离子色谱法测定食品中二氧化硫残留量[J].海南师范大学学报自科版,2021,34(2):166-171 |
| 离子色谱法测定食品中二氧化硫残留量 |
| Determination of Sulfur Dioxide in Food by Ion Chromatography |
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| DOI：10.12051/j.issn.1674-4942.2021.02.008 |
| 中文关键词: 离子色谱法 酸化蒸馏 二氧化硫残留量 |
| 英文关键词: ion chromatography acidification distillation sulfur dioxide residue |
| 基金项目: |
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| 中文摘要: |
| 建立二氧化硫残留量测定仪-离子色谱法测定食品中二氧化硫的分析方法。样品加入
10 mL 盐酸（1∶1）后，使用二氧化硫残留测定仪进行蒸馏，蒸馏液中二氧化硫被 20 mL 过氧化氢
（2%）溶液吸收氧化为硫酸根，通过离子色谱仪对馏出液中硫酸根含量进行测定，以保留时间定性，
峰面积定量，经计算转化为样品中二氧化硫的含量。结果表明：离子色谱KOH淋洗液洗脱梯度条
件为10 mmol/L 18 min、40 mmol/L 5 min、10 mmol/L 5 min时，硫酸根标准溶液的浓度在0～5.0 mg/L
范围内呈良好的线性关系（R2 = 0.999 6），检出限（S /N = 3）为0.012 mg/kg，样品加标回收率范围为
97.6～102.3%。本方法操作简便快速，准确度、精密度好，适用于不同类型食品中二氧化硫的测定。 |
| 英文摘要: |
| An analytical method for the determination of sulfur dioxide in food by sulfur dioxide residue analyzer - ion
chromatography was established. After 10 mL of hydrochloric acid(1:1) joined into the sample, the solution was distilled
with sulfur dioxide residue analyzer. The sulfur dioxide in the distilled liquid was oxidized to sulfate radical by 20 mL of hy⁃
drogen peroxide (2%) solution, and the content of sulfate radical in the distillate was determined by ion chromatography
(qualitative analysis by retention time and quantitative analysis of sulfur dioxide content by peak area). It was shown that
when elution gradients of ion chromatography eluent KOH were 10 mmol/L for 18 min, 40 mmol/L for 5 min and 10 mmol/L
for 5 min, it had a good linear relationship (R2 = 0.999 6) in the sulfate standard concentration range of 0 ~ 5.0 mg/L , where
the limit of detection and recovery rate were 0.012 mg/kg and 97.6 ~ 102.3%, respectively. Overall, the method is simple,
rapid, accurate, and it could be widely used in the determination of sulfur dioxide in different types of food. |
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