偶氮氯膦MK分光光度法测定微量铍

Determination of Micro Beryllium by Using CPAMK Spectrophotometric Method

摘要:

在pH值为5.8的六次甲基四胺缓冲液的存在下，用EDTA和酒石酸钠掩蔽，铍与新型显色剂：偶氮氯膦MK形成稳定络合物。最大吸收波长于620nm处。表观摩尔吸收常数为2.32×104L·mol1·cm1。铍含量在0~5μg/25mL内服从比耳定律。该方法用于水样中铍含量的测定，得到较好效果。

Abstract:

In the presence of hexamethylene tetramine buffer with the pH value of 5.8, using EDTA and sodium tartrate as masking, beryllium and chlorophosphonazoMK can which is a new chromogenic reagent can form a stable complex. The maxium absorption wave length is at 620nm. The apparent molar absorption coefficient is 2.32×104 L·mol1·cm1. The content of beryllium in the range of 0~5ug per 25mL should obeys beer’s Law. By uisng this method, determination of beryllium content in water samples can obtain very good effect.