国标GB5750-85双硫腙分光光度法测定镉——对水样预处理方法的探讨

Study on Digestive Method of Water Sample for Determination of Cd by Dithizone Spectrophotometry (GB 5750-85)

对双硫腺分光光度法测定Cd时 ,水样处理方法进行了探讨 ,针对某些污染严重的水样 ,采用浓硝酸 -过氧化氢前处理水样 ,并在有Na3PO4 存在的情况下 ,于 60 0℃的高温炉中灰化 。

The digestive method of water has been studied for determination of Cd by dithizone spectrophotometry.The samples were treated by the HNO 3-H 2O 2 and ashed by 600℃ high temperature in the presence of Na 3PO 4.The results are satisfactory.