| 不完全抑制电导检测离子色谱法测定饮料中的苹果酸 |
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| 引用本文： | 朱岩,徐素君,王素芬. 不完全抑制电导检测离子色谱法测定饮料中的苹果酸[J]. 分析化学, 1999, 27(9): 1050-1053 |
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| 作者姓名： | 朱岩 徐素君 王素芬 |
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| 作者单位： | 浙江大学西溪校区化学系,杭州,310028 |
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| 基金项目： | 浙江省自然科学基金，分析测试基金资助项目 |
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| 摘 要： | 采用一种抑制型离子色谱检测技术－－不完全抑制电导检测，以０．７５ｍｍｏｌ／ＬＮａ２ＳＯ４＋ＮａＯＨ（ｐＨ＝１１．５）为淋洗液对弱酸根离子如苹果酸、酒石酸等进行了测定，得到苹果酸、酒石酸的检测限分别为１．３１ｍｇ／Ｌ、３．０４ｍｇ／Ｌ；在２００ｍｇ／Ｌ以下相关系数分别为０．９９９８、０．９９９９；；各离子峰高的相对标准偏差（ＲＳＤ）分别为０．５７％、１．６０％。上率为９７．７￣１０４％。常见的强酸离
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| 关 键 词： | 离子色谱 不完全抑制电导检测 苹果酸 |
Determination of Malic Acid by Incompleted Suppressed Conductivity Detection in Ion Chromatography |
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| Zhu Yan,XU Sujun,WANG Sufen. Determination of Malic Acid by Incompleted Suppressed Conductivity Detection in Ion Chromatography[J]. Chinese Journal of Analytical Chemistry, 1999, 27(9): 1050-1053 |
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| Authors: | Zhu Yan XU Sujun WANG Sufen |
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| Abstract: | Malic acid in soft drinks was determined by ion chromatogaphy using incompleted (indirect) suppressed conductivity detection. The mobile phase used contained 0.75 mmol/L Na2SO4 + NaOH(pH = 11.5). Trie detection limits of malic acid and tartaric acid were 1.31 mg/L, 3.04 mg/L respectively. The correlation coefficients of standard curves for malic acid and tartaric acid were 0.9998 and 0.9999 respectively in the range of 0-200 mg/L. RSDs for peak height were 0. 6% , 1. 6% (n = 7) respectively. The recoveries were 97.7% -104.0% . The common inorganic ions did not interfere. |
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| Keywords: | Ion chromatography incompleted suppressed conductivity detection malic acid |
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