三氮烯试剂析相光度法测定痕量铜的研究  

Study on the determination of trace copper by using the phase separation spectrophotometry with triazene reagent

作　　者：郭亚杰[1] 张建芸 王广健[1] 

机构地区：[1]淮北煤炭师范学院化学系,安徽淮北235000 [2]中山纪念中学,广东中山528454

出　　处：《冶金分析》2001年第2期4-6,共3页Metallurgical Analysis

摘　　要：研究了三氮烯试剂 -铜 -OP乳化剂析相富集体系在Na2 B4O7-NaOH( pH10 2 )介质中 ,于 90± 1℃加热胶束溶液 ,保持 45min ,络合物即被OP乳化剂完全富集。富集液在 5 2 0nm处测定吸光度 ,铜含量在 0～ 3 0 μg/5 0mL范围内服从比尔定律 ,该法与一般光度法相比 ,灵敏度高 ,选择性好。用于铝合金样中铜的测定 ,结果满意。A study on the phase separation system of triazene copper OP emulsifying agent was carried out. In the medium of Na 2B 4O 7 NaOH buffer at pH 10.2, the complex of triazene copper could be enriched in the phase of OP emulsifying agent, when heating at 90±1℃ for 45min in a boilling water bath. The absorption was measured at 530nm and Beer's law was obeyed in the range of 0～3.0μg Cu 2+ /50mL. The method was characteristic of high sensitivity and selectivity compared with that ordinary spectrophotometry. The method has been applied to determine trace copper in aluminium alloy with satisfactory results.

关 键 词：三氮烯试剂 铜 析相光度法 测定 铝合金 

分 类 号：O657.3[理学—分析化学]