摘要
研究了镉试剂（Ｃａｄｉｏｎ，对硝基苯基重氮氨基偶氮苯）－Ｃｄ（Ⅱ）－ＯＰ乳化剂析相富集体系，在ｐＨ１０．６的Ｎａ２Ｂ４Ｏ７－ＮａＯＨ介质中，于９０±１℃加热胶束溶液，保持４５ｍｉｎ，络合物即被ＯＰ乳化剂相完全富集。富集液在４９０ｎｍ处测定吸光度值，镉含量在０．３７～４．５０μｇ／５０ｍｌ范围内服从比尔定律，表观摩尔吸光系数ε＝９．７×１０５。该法灵敏度高，选择性好，已用于工业废水样中痕量镉的测定，结果满意。
A study on the phase separation system of cadion(p-nitrobenzene-diazoaminazo benzene)-cadmium-OP emulsifying agent was carried out.In the medium of Na 2B 4O 7-NaOH buffer (pH10.6),the complex of cadion-cadmium can be enriched in the phase of OP,the emulsifying agent,when heating at 90±1℃ for 45min in a boilling water bath.The absorbance is measured at 490nm and Beer's law is obeyed in the range of 0.37-4.5μgCd 2+ /50ml,the apparent molar absorptivity is 9.7×10 5L·mol -1 ·cm -1 .The highly sensitive and selective method has been applied to the determination of trace cadmium in industrial waste water samples with satisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
1998年第4期3-5,22,共4页
Metallurgical Analysis
