电位法基体效应在氟离子选择性电极分析中的影响
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赵玲丽, 张嘉捷, 徐孝菲, 习玲玲, 委育秀, 唐云湖, 林旭锋
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Matrix Effects in Potentiometric Method on Fluoride Selective Electrode Analysis
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Lingli Zhao, Jiajie Zhang, Xiaofei Xu, Lingling Xi, Yuxiu Wei, Yunhu Tang, Xufeng Lin
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表6 红茶和绿茶实际样品的检测结果
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| 样品 | 稀释倍数 | 标准曲线法 | | 标准加入法 | | 测定浓度/(mol∙L−1) | RSD/% | 测定浓度/(mol∙L−1) | RSD/% | | 红茶样品 | 0.25X | 5.37 × 10−5 | 2.25 | | 4.88 × 10−5 | 2.25 | | 0.5X | 1.15 × 10−4 | 0 | | 1.11 × 10−4 | 2.25 | | 1X | 2.15 × 10−4 | 0 | | 2.32 × 10−4 | 0 | | 绿茶样品 | 0.25X | 2.10 × 10−5 | 2.25 | | 2.08 × 10−5 | 2.25 | | 0.5X | 4.84 × 10−5 | 0 | | 4.53 × 10−5 | 0 | | 1X | 9.07 × 10−5 | 0 | | 8.80 × 10−5 | 0 | | 红茶样品(10%乙醇) | 0.25X | 8.61 × 10−5 | 2.25 | | 5.60 × 10−5 | 2.25 | | 0.5X | 1.77 × 10−4 | 0 | | 1.16 × 10−4 | 0 | | 1X | 3.40 × 10−4 | 2.25 | | 2.40 × 10−4 | 2.25 | | 绿茶样品(10%乙醇) | 0.25X | 3.27 × 10−5 | 0 | | 2.23 × 10−5 | 2.25 | | 0.5X | 6.89 × 10−5 | 0 | | 4.53 × 10−5 | 0 | | 1X | 1.33 × 10−4 | 2.25 | | 9.18 × 10−5 | 0 |
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