| 硼酸锌中三氧化二硼含量测定的新方法 |
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| 引用本文： | 王向东,龚晓光,段巧丽.硼酸锌中三氧化二硼含量测定的新方法[J].弹性体,2004,14(6):61-63. |
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| 作者姓名： | 王向东 龚晓光 段巧丽 |
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| 作者单位： | 1. 通化茂祥制药有限公司,吉林,通化,134001
2. 中国石油吉林石化公司研究院,吉林,吉林,132021 |
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| 摘 要： | 建立了一种测定硼酸锌中三氧化二硼(B2O3)含量的新方法．即以溴甲酚绿-甲基红混合指示荆来确定硼酸的滴定起点。已有方法以甲基橙为指示剂来确定硼酸的滴定起点，溶液颜色由橙色变为黄色，变化不明显．因而不易掌握，误差大。以溴甲酚绿．甲基红混合指示剂指示时，溶液的颜色由绿色变为暗红色．变色明显，准确率及精密度高，且操作音易于掌握。
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| 关 键 词： | 硼酸锌 三氧化二硼 甲基红 新方法 滴定 B2O3 硼含量 溴甲酚绿 准确率 测定 |
| 文章编号： | 1005-3174(2004)06-0061-03 |
| 修稿时间： | 2004年10月12 |
A novel approach to analyze boron trioxide content in zinc borate |
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| WANG Xiang-dong,GONG Xiao-guang,DUAN Qiao-li.A novel approach to analyze boron trioxide content in zinc borate[J].China Elastomerics,2004,14(6):61-63. |
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| Authors: | WANG Xiang-dong GONG Xiao-guang DUAN Qiao-li |
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| Affiliation: | WANG Xiang-dong~1,GONG Xiao-guang~2,DUAN Qiao-li~2 |
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| Abstract: | A novel approach to analyze the content of boron trioxide in zinc borate was established using bromocresol green-methyl red mixture as indicator to determine the titration starting point. This new approach was more accurate and easier to be mastered than that of previous approach for the color change of solution in the former was from green to dark red and thus obvious, while that in the later was from orange to yellow and thus indistinct. |
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| Keywords: | zinc borate boron trioxide bromocresol green-methyl red mixed indicator methyl orange titration |
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