| 分光光度法测定水的硬度 |
| |
| 引用本文： | 魏正妍,李金霞.分光光度法测定水的硬度[J].新乡师范高等专科学校学报,2001,15(1):80-81. |
| |
| 作者姓名： | 魏正妍 李金霞 |
| |
| 作者单位： | 1. 新乡师范高等专科学校化学系,
2. 焦作市六中, |
| |
| 摘 要： | 研究了酸性铬蓝 K(ACBK)在 p H为 10 .0的 NH3- NH4Cl介质中与钙和镁同时显色的条件 ,试验表明 ,Ca2 + 和 Mg2 + 离子均可与 ACBK形成 1∶ 1的配合物 ,在 46 8nm波长处 ,两种配合物存在一等摩尔吸收点 ,对应于该点的等摩尔吸光系数ε=7.6× 10 3L· mol- 1 · cm- 1 ,在此波长及最佳操作条件下 ,Ca2 + 和 Mg2 + 的总含量在 0～ 3× 10 - 5 m ol· L- 1 浓度范围内符合比耳定律。建立了测定钙镁总含量的方法 ,应用于水硬度的测定 ,结果令人满意。
|
| 关 键 词： | 分光光度法 酸性铬蓝K 水硬度 |
| 文章编号： | 1008-7613(2001)01-0080-02 |
| 修稿时间： | 2000年10月20 |
Determination of Water Hardness by Spectrophotometry |
| |
| WEI Zheng-yan,LI Jin-xia.Determination of Water Hardness by Spectrophotometry[J].Journal of Xinxiang Teachers College,2001,15(1):80-81. |
| |
| Authors: | WEI Zheng-yan LI Jin-xia |
| |
| Abstract: | The conditions for simultaneous colouration reaction of Ca and Mg with ACBK are studied in the medium of NH 3-NH 4Cl solution (pH=10.0).The results show that Ca 2+ and Mg 2+ with ACBK form 1∶1 complex,which give an equal absorption peak at 468nm with the molar absorption coefficient of 7.6×103L·mol -1·cm -1.Beers law is obeyed in the total concentration range of 3~3×10 -5mol·L -1.A method for the determination of total concentration f Ca and Mg was established,it has been applied to the determination of water hardness,satisfactory results were obtained. |
| |
| Keywords: | spectrophotometry ACBK water hardness |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
