主次波长分光光度法测定水中铬(Ⅵ)

Determination of Chromium ( Ⅵ ) in Water by Primary-Secondary Wavelengthes Spectrophotometry

本文在铬(Ⅳ)—二荐碳酰二肼(二苯卡巴肼)显色反应基础上,依据稳定悬浊液对光的吸收行为,研究了主次波长光度法测定水中痕量铬(Ⅵ)的新方法,建立了具有环境条件修正性的计算模型.该方法简单、易操作,精密度和灵敏度较高.适合于环境水的分析.

In acidic solution chromium( VI)may react with diphenyl carbazide to fora red complex. Based on this coloured reaction with the absorption behaviour of a suspending liquid against light,new primary-secondary wavelengthes spectrophotometry was studied to determine trace Cr in environmental water. Such a calculation model was developed to be affected hardly by operation coditions. The method is easy and simple in operation and high in both precision and sensitivity. It is suitable for analysis of trace Cr in Water .