| 加酸顺序对碱性高锰酸钾法测定的影响 |
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| 引用本文： | 姚秀琴,谭卫华. 加酸顺序对碱性高锰酸钾法测定的影响[J]. 吉林建筑工程学院学报, 1994, 0(4) |
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| 作者姓名： | 姚秀琴 谭卫华 |
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| 作者单位： | 吉林建筑工程学院城建系，吉林建筑工程学院城建系 |
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| 摘 要： | 本文通过大量实验,对现行碱性 KMnO_4法进行了研究、探讨,发现该方法在加热消化后先加入硫酸酸化,造成测量结果不易平行,准确度下降,Cl~-干扰增大.本文采用加热消化后先加入草酸标准溶液,然后再加入硫酸酸化,明显改善了测量精密度和可比性,提高了准确度并且显著降低了 Cl~-的干扰.
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| 关 键 词： | 碱性高锰酸钾法 加酸顺序 H_2SO_4酸化 |
Influence of Sequence of Adding Acid on Measurement of Alkaline KMnO_4 Method |
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| Yao Xiuqin Tan Weihua. Influence of Sequence of Adding Acid on Measurement of Alkaline KMnO_4 Method[J]. Journal of Jilin Architectural and Civil Engineering, 1994, 0(4) |
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| Authors: | Yao Xiuqin Tan Weihua |
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| Affiliation: | Department of Urban Construction |
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| Abstract: | Conventional alkaline KMnO_4 method is studied through a lot of experiments in this paper.It is discovered that earlier H_2SO_4 acidification after heating digestion makes the measured results balance uneasily,the accuracy and precision decrease,and Cl~- interference increase.In this study,the accuracy and precision are greatly improved and Cl~- interference is largely decreased,by means of adding oxalicaeid solution at first and then adding H_2SO_4 for acidification after heating digestion. |
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| Keywords: | alkaline KMnO_4 method sequence of adding acid |
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