登录    注册    忘记密码

详细信息

分光光度法测定水的硬度    

Determination of Water Hardness by Spectrophotometry

文献类型:期刊文献

中文题名:分光光度法测定水的硬度

英文题名:Determination of Water Hardness by Spectrophotometry

作者:魏正妍[1];李金霞[2]

第一作者:魏正妍

机构:[1]新乡师范高等专科学校化学系,河南新乡453000;[2]焦作市六中,河南焦作454001

第一机构:新乡学院化学化工学院

年份:2001

卷号:15

期号:1

起止页码:80-81

中文期刊名:新乡师范高等专科学校学报

外文期刊名:Journal of Xinxiang Teachers College

语种:中文

中文关键词:分光光度法;酸性铬蓝K;水;硬度;钙镁总含量

外文关键词:spectrophotometry,ACBK,water hardness

摘要:研究了酸性铬蓝K(ACBK)在pH为10.0的NH3-NH4Cl介质中与钙和镁同时显色的条件,试验表明,Ca^2+和Mg^2+离子均可与ACBK形成1:1的配合物,在468nm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,Ca^2+和Mg^2+的总含量在0-3×10^-5mol^-1·cm^-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。
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.

参考文献:

正在载入数据...

版权所有©新乡学院 重庆维普资讯有限公司 渝B2-20050021-8 
渝公网安备 50019002500408号 违法和不良信息举报中心