对乙酰基偶氮胂吸光光度法测定微量铜  

ABSORPTIOPHOTOMETRIC DETERMINATION OF MICROAMOUNTS OF COPPER WITH p-ACETYLARSENAZO

作　　者：翟庆洲[1] 杨丽娟 徐安丽 陈明岩[4] 邹明强[4] 商明磊[4] 

机构地区：[1]吉林大学化学系 [2]辽阳铝型材有限公司 [3]通化电视大学 [4]吉林进出口商品检验局,长春130062

出　　处：《理化检验（化学分册）》2000年第10期453-454,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：在 p H 5.0的 (CH2 ) 6N4 - HCl缓冲介质中 ,Cu( )与对乙酰基偶氮胂 (ASAp A)形成 1比 2络合物 ,λmax=598nm,εmax=1 .30× 1 0 4 L· mol-1·cm-1,铜浓度在 0～ 2 .0 mg·L-1范围内遵从比耳定律。方法用于粮食、食品、水、树叶及人发等试样中铜的测定 ,结果满意。In a buffer solution of (CH 2) 6N 4 HCl at pH 5.0, copper(Ⅱ) reacts with p acetylarsenazo to form a 1∶2 complex. Its absorption maxima lies at 598nm. The apparent molar absorptivity is 1.30×10 4. Beer′s law is followed over the concentration range of 0~2.0μg·ml -1 for copper (Ⅱ). The method was used in the determination of copper in foods, water, tree leaves, and human hair etc, with satisfactory results.

关 键 词：铜 ASApA 吸光光度法 粮食 食品 人发 微量分析 

分 类 号：O614.121[理学—无机化学] O657.3[理学—化学]