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本文研究一种应用单柱离子色谱技术分离测定茶叶中草酸含量的新方法，样品制备简单，勿需复杂的化学处理。自动进样器将试液直接注入色谱柱，进行分析，每个样品的测定仅需１５ｍｉｎ。检测灵敏度为０．１μＳ／ｃｍ×３２＝３．２μＳ／ｃｍ，最低检出限为０．１２ｐｐｍ，线性范围１～１０００ｐｐｍ，变异系数为０．９１％，平均回收率９８．７％。该法具有简便、快速、灵敏、准确、选择性好的特点。
In this paper, a new method for the separation and determination of oxalic acid in tea using single column ion chromatography was studied. The preparation of the sample is simple and requires no complicated chemical treatment. The autosampler injects the test solution directly onto the column for analysis, with each sample measuring only 15 minutes. The detection sensitivity was 0.1μS / cm × 32 = 3.2μS / cm, the minimum detection limit was 0.12ppm, the linear range was 1 ~ 1000ppm, the coefficient of variation was 0.91% and the average recovery was 98.7%. The method is simple, fast, sensitive, accurate and selective.