| 微分脉冲极谱法测定饮料的总酸量 |
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| 引用本文： | 李春艳,林新华,黄丽英.微分脉冲极谱法测定饮料的总酸量[J].福建分析测试,2001,10(2):1415-1417. |
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| 作者姓名： | 李春艳 林新华 黄丽英 |
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| 作者单位： | 福建医科大学药学系化学教研室,福建,福州,350004 |
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| 摘 要： | 本文采用微分脉冲极谱法于浓度为0.5mol·L~(-1)的KCl底液,5.84×10~(-4)mol·L~(-1)的柠檬酸标准液,pH为5.65,CdCO_3粉末加入量为0.2g,通N_27min的条件下测定饮料中的总酸量。本法的线性方程为y=9.0288x+0.4192,线性浓度范围1.2×10~(-5)～8.4×10~(-5)mol/L,相关系数R=0.9995,标准偏差为0.142,测定结果与中和滴定法和电位滴定法对比,表明微分脉冲极谱法可以简单、快速、准确测定饮料中的总酸量。
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| 关 键 词： | 微分脉冲极谱法 测定 饮料 总酸量 |
Determination of total acidity in drink by differential pulse polarography |
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| Li Chunyan,Lin Xinhua,Huang Liying.Determination of total acidity in drink by differential pulse polarography[J].Fujian Anal Ysis & Testing,2001,10(2):1415-1417. |
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| Authors: | Li Chunyan Lin Xinhua Huang Liying |
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| Abstract: | Total acidity in drink was determined by differential pulse polarography under conditions of 0. 5mol·L~(-1)KC1, 5. 84×10~(-4)mol·L~(-1) citric acid, 0. 2g CdCO_3 (s), pH=5. 65 and removing O_2 by pure N_2 for 7 minutes. The results showed that the linearity equation was y=9. 0288x + 0. 4192, the concentration was linear, range in 1. 2×10~(-5)～8. 4×10~(-5)mol·L~(-1) the corrlative coefficient (R) was =0. 9995,standard deviation of determining total acidity in drink was 0.142. Comparing the results of differential pulse polarography, with acid-base titration and potentiometric titration showed that differential pulse pulse polarography may determine acidity in drink accurately. |
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| Keywords: | Differential pulse polarography Total acidity Drink Determination |
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