摘要
本文研究了二苯氨基脲（sys－DiphenylCarbazid，简称DPC）与铬（Ⅵ）的显色反应。在硫酸—磷酸介质中，铬（Ⅵ）与DPC结合成一种紫红色络合物，其最大吸收波长为540nm，铅量在0－25μg／ml范围内符合比耳定律。相对标准偏差为1－3％。用于水样中铬（Ⅵ）的测定，结果满意。
Chrondum(Ⅵ )was able to react with sys - diphenyl-carbazide a nd form a purplish red coordinat ion com pound in the presence of 1:1 H2SO4 -H3PO4. The complex had a maximum absorbance at 540nm. The range of 0- 25 ug of Cr(Ⅵ)in 1 ml solution is obeyed Beer's Law. RSD<3 %. The method had been applied to determine chrodrium in water samples and the result is satisfied.
出处
《青海医学院学报》
CAS
1997年第3期158-159,共2页
Journal of Qinghai Medical College
基金
青海省教委资助
关键词
二苯氨基脲
分光光度法
铬
测定
sys-Diphenyl-Carbazide Spectrophotometry Chromium
