| 硅钼蓝法测定水中二氧化硅实验条件的优化 |
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| 引用本文： | 康磊,李杨,邢雅琴,于惠. 硅钼蓝法测定水中二氧化硅实验条件的优化[J]. 北京石油化工学院学报, 2015, 0(3): 5-10. DOI: 10.3969/j.issn.1008-2565.2015.03.002 |
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| 作者姓名： | 康磊 李杨 邢雅琴 于惠 |
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| 作者单位： | 国家级煤化工检测重点实验室，宁夏银川 750002;宁夏宝塔化工中心实验室 有限公司，宁夏银川750002;北京石油化工学院化学工程系,北京,102617;宁夏产品质量监督检验院,宁夏银川,750001 |
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| 摘 要： | 在传统硅钼蓝分光光度法测定水中二氧化硅的基础上,研究了不同还原剂种类对硅钼蓝显色法的影响。通过比较,确定了抗坏血酸为最适宜的还原剂种类。通过优化实验条件,分别探讨了还原剂用量、酸度、显色时间对反应的影响,建立了新的标准曲线,其线性相关系数达到0.999 9。该方法的加标回收率为98.55%,相对标准偏差为0.67%,具有稳定和重现性好的特点,可对水中二氧化硅检测提供准确数据。
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| 关 键 词： | 硅钼蓝法 还原剂 二氧化硅 |
Investigation of Optimum Conditions for Silicon Dioxide Determination in Water by Silico-molybdenum Blue Spectrophotometry |
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| Abstract: | Based on the determination of silicon dioxide in water by traditional silico‐molybdenum blue spectrophotometry , the effect of different kinds of reducing agents on silico‐molybdenum blue spectrophotometry was studied . By comparison , ascorbic acid was determined as the optimum reducing agent .At the same time ,the effects of the reductant quantity ,acidity and col‐oration time were discussed ,and the new standard curve was also established ,in which the correlation coefficiency was 0.9999 .According to the research ,the recovery was 98.55% ,and the relative standard deviation was 0.67 , which had good stability and reproducibility . Therefore ,the improved method was suitable for the detection of silica in water . |
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| Keywords: | silico-molybdenum blue spectrophotometry reducing agent silica |
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