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Determination of common inorganic anions in tea samples by ion chromatography

机译:离子色谱法测定茶叶中常见的无机阴离子

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摘要

Plants exposure to environmental sources of common inorganic anions (chloride, nitrate, phosphate, and sulphate) is discussed. Various commercial tea products were examined for the content of water soluble anions by the use of sample preparation procedure corresponding to the conditions generally applied for the preparation of tea infusions (2 g of tea, 5 min brewing time, 250 ml final volume) widely consumed by humans. Suppressed ion chromatography (IC) (Metrohm Metrosep A Supp 5 (150 mm × 4 mm) column) with conductometric detection was used for the determination. The IC technique allows isolation of the signals of particular anions and their detection (DLs of 0.012 (Cl), 0.019 (NO ), 0.047 (PO ), and 0.011 (SO ) mg l) within 15 min.
机译:讨论了植物暴露于环境中常见的无机阴离子(氯离子,硝酸根,磷酸根和硫酸根)的情况。通过使用样品制备程序检查各种市售茶产品中水溶性阴离子的含量,该程序与通常广泛使用的泡制茶液(2 g茶,5分钟的冲泡时间,250 ml最终体积)的制备一般适用的条件相对应由人类。测定采用电导检测的抑制离子色谱(IC)(Metrohm Metrosep Supp 5(150 mm×4 mm)色谱柱)进行。 IC技术可在15分钟内分离出特定阴离子的信号并对其进行检测(DL值为0.012(Cl),0.019(NO),0.047(PO)和0.011(SO)mg l)。

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