| 酸性络蓝K双波长信号系数光度法测定钙镁 |
| |
| 引用本文： | 黄泽南,周秀林,周舟,杨昌帆.酸性络蓝K双波长信号系数光度法测定钙镁[J].理化检验(化学分册),2009,45(3). |
| |
| 作者姓名： | 黄泽南 周秀林 周舟 杨昌帆 |
| |
| 作者单位： | 黄泽南,周秀林,周舟,HUANG Ze-nan,ZHOU Xiu-lin,ZHOU Zhou(湖南科技大学,化学化工学院,湘潭,411201);杨昌帆,YANG Chang-fan(湖南工程学院,化学系,湘潭,411104)
|
| |
| 摘 要： | 基于在氢氧化钠溶液中,钙、镁均与酸性络蓝K(ACBK)形成暗红色配合物,提出了测定钙和镁的双波长信号系数光度法.该法不仅消除了钙、镁之间的吸收干扰,且消除了一定量的共存离子的干扰.利用褪色法与生色法的吸光度之和作为信号吸光度,使方法的灵敏度大为提高.测定钙、镁总量时,分别用钙、镁吸收曲线正峰与负峰上的等吸收波长470.5 nm(λPa)及559.5 nm(λNa)处测定吸光度APa和ANa,求得总量的信号系数fs为2.439.于λPa470.5 nm处测得任一浓度钙、镁试液的吸光度APa′,其信号吸光度As=fsAλPa′.测定镁时,以试剂ACBK褪色对钙配合物生色的完全相消干扰的波长539 nm(Pa)作为测定波长,负峰波长583 nm为Na.按相同方法测得镁的信号系数fs为4.148.
|
| 关 键 词： | 双波长信号系数光度法 等吸收波长 完全干扰相消波长 酸性络蓝K 钙 镁 |
Signal Coefficient-DW Spectrophotometric Determination of Calcium and Magnesium with Acid Chrome Blue K as Color Reagent |
| |
| HUANG Ze-nan,ZHOU Xiu-lin,ZHOU Zhou,YANG Chang-fan.Signal Coefficient-DW Spectrophotometric Determination of Calcium and Magnesium with Acid Chrome Blue K as Color Reagent[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,2009,45(3). |
| |
| Authors: | HUANG Ze-nan ZHOU Xiu-lin ZHOU Zhou YANG Chang-fan |
| |
| Institution: | HUANG Ze-nan1,ZHOU Xiu-lin1,ZHOU Zhou1,YANG Chang-fan2(1.College of Chem.and Chem.Eng.,Hunan University of Science and Technology,Xiangtan 411201,China,2.Dept.of Chemistry,Hunan Institute of Engineering,Xiangtan 411100,China) |
| |
| Abstract: | Base on the formation of dark colored coordination complexes by the reaction of both calcium and magnesium ions with the color reagent acid chrome blue K(ACBK in short) in NaOH solution the DW-signal coefficent spectrophotometric method for simultaneous determination of calcium and magnesium was proposed.Not only the interference due to over lapping of absorption spectra of the complexes formed,but also the interferences due to some co-existing cations were eliminated by the proposed method.Sensitivity of t... |
| |
| Keywords: | Dual-wavelength signal coefficient spectrophotometry Iso-absorption wavelength Wavelength of ultimate interference elimination Acid chrome blue K Calcium Magnesium |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
