螯合树脂预浓集薄层树脂相吸光光度法测定痕量铜的研究  

Study on the Determination of Trace Cu(Ⅱ) by DDTC Chelating Resin Preconcentration and Thin Layer Resin Phase Spectrophotometry

作　　者：闫永胜[1] 黄卫红[1] 陆晓华[1] 

机构地区：[1]华中科技大学环境科学研究所,武汉430074

出　　处：《分析科学学报》2004年第4期409-411,共3页Journal of Analytical Science

摘　　要：本文提出了在弱酸性条件下,以螯合树脂预浓集薄层树脂相光度法测定铜的新方法。本法灵敏度高(ε_(435)=3.6×10~5L·mol^(-1)·cm^(-1)),比液相光度法提高33倍;选择性好,大多数共存离子不影响测定;方法的检出限为5.3μg·L^(-1),RSD为1.67％(n=6)。对水样和高纯稀土试样中的痕量铜进行了测定,结果令人满意。A method to determine Cu(Ⅱ) by DDTC chelating resin preconcentration and thin layer resin phase spectrophotometry has been developed. The method is sensitive with a apparent molar absorption of 3.6×10~5 L·mol^(-1)·cm^(-1), which is 33 times higher than that of liquid phase spectrophotometry. It has a good selectivity, and most coexisting ions do not influence the determination. The detection limit for Cu(Ⅱ) is 5.3 μg/L with the precision of 1.67%(n=6,30μg Cu(Ⅱ)). The calibration curve is linear in the range of 0～7.2 μg/mL. The preposed method was applied to the determination of Cu in water and high pure rare earth meterial with satisfactory results.

关 键 词：整合树脂 预浓集 薄层树脂相吸光光度法 铜 

分 类 号：O657.3[理学—分析化学] O652.6[理学—化学]