| 离子色谱法测定蔬菜硝酸盐含量 |
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| 引用本文： | 杨敏,林国剑,钟国华,官珊,李晓刚.离子色谱法测定蔬菜硝酸盐含量[J].理化检验(化学分册),2005,41(6):412-414. |
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| 作者姓名： | 杨敏 林国剑 钟国华 官珊 李晓刚 |
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| 作者单位： | 广州市农业标准与监测中心,广州,510435;华南农业大学昆虫毒理研究室,农药与化学生物学教育部重点实验室,广州,510642 |
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| 基金项目： | 广东省教育厅自然科学研究项目(03006) |
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| 摘 要： | 建立了化学抑制电导检测离子色谱法定性定量分析蔬菜硝酸盐含量的方法。阴离子分离柱DionexAS14柱(4mm×250mm),保护柱IonPacAG14(4mm×50mm)。流动相为1.7mmol.L-1NaHCO3,1.8mmol.L-1Na2CO3。流速1.2mL.min-1,自动连续再生抑制装置SRS-ULTRA4mm。线性范围为0.1~100.0mg.L-1,线性关系为0.9997,检出限为0.05mg.L-1。应用此法,测定了多种蔬菜硝酸盐含量。方法操作简单、快速、基体干扰少、灵敏、准确。
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| 关 键 词： | 离子色谱法 蔬菜 硝酸盐 |
| 文章编号： | 1001-4020(2005)06-0412-03 |
| 修稿时间： | 2004年2月26日 |
ION CHROMATOGRAPHIC DETERMINATION OF NITRATE IN VEGETABLES |
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| YANG Min,LIN Guo-jian,ZHONG Guo-hua,GUAN Shan,LI Xiao-gang.ION CHROMATOGRAPHIC DETERMINATION OF NITRATE IN VEGETABLES[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2005,41(6):412-414. |
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| Authors: | YANG Min LIN Guo-jian ZHONG Guo-hua GUAN Shan LI Xiao-gang |
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| Abstract: | An ion chromatographic method for qualitative and quantitative analysis of nitrate in vegetables was established. The analysis was performed under conditions of a Dionex AS14 separation column (4 mm250 mm) and an Ion Pac AG14 protection column (4 mm50 mm). The mobile phase composed of 1.7 mmolL~(-1) NaHCO_3-1.8 mmolL~(-1) Na_2CO_3 was used at a flow sate of 1.2 mLmin~(-1) driven by an auto regeneration suppressor SRS-ULTRA 4 mm. Linear working curve was obtained in the range of 0.1 mgL~(-1)~100 mgL~(-1) with a correlation coefficient of 0.999 0. Detection limit was 0.05 mgL~(-1) for nitrate. The method has been applied to the determination of nitrate in several kinds of vegetable with satisfactory results. |
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| Keywords: | Ion chromatography Vegetables Nitrate |
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