胶束介质中钍和铀的同步导数分光光度法测定

Simultaneous derivative spectrophotometric determination of thorium and uranium in a micellar medium.

作者信息

Agnihotri N K, Singh V K, Singh H B

机构信息

Department of Chemistry, University of Delhi, Delhi 110007, India.

出版信息

Talanta. 1993 Dec;40(12):1851-9. doi: 10.1016/0039-9140(93)80107-3.

DOI:10.1016/0039-9140(93)80107-3

PMID:18965862

Abstract

Derivative photometric methods for trace analysis of Th(IV) and UO(2)(II), and their simultaneous determination in mixtures using 5,8-dihydroxy-1,4-naphthoquinone in a micellar medium are reported. Molar absorptivity and Sandell's sensitivity of 1:2 Th(IV) and 1:1 UO(2)(II) complexes at their lambda(max), 614.5 nm and 637.0 nm are, 1.19 x 10(4) 1/mol/cm and 1.12 x 10(4) 1/mol/cm and 1.95 x 10(-2) mug/cm(2) and 2.13 x 10(-2) mug/cm(2) mug/cm(2), respectively. Calibration graph is linear over the range 9.28 x 10(-2)-18.56 mug/ml of Th(IV) and 9.52 x 10(-2)-19.04 mug/ml of UO(2)(II). Though presence of Th(IV) and UO(2)(II) causes interference in each others determination, 9.28 x 10(-1)-9.28 mug/ml Th(IV) and 9.52 x 10(-1)-9.52 mug/ml UO(2)(II) when present together, can be simultaneously determined using derivative spectra.

摘要

报道了用于钍（IV）和二氧化铀（II）痕量分析的导数光度法，以及在胶束介质中使用5,8 - 二羟基 - 1,4 - 萘醌同时测定混合物中钍（IV）和二氧化铀（II）的方法。在其最大吸收波长614.5 nm和637.0 nm处，1:2钍（IV）和1:1二氧化铀（II）配合物的摩尔吸光率和桑德尔灵敏度分别为1.19×10⁴ 1/mol/cm和1.12×10⁴ 1/mol/cm，以及1.95×10⁻² μg/cm²和2.13×10⁻² μg/cm²。校准曲线在钍（IV）浓度为9.28×10⁻² - 18.56 μg/ml和二氧化铀（II）浓度为9.52×10⁻² - 19.04 μg/ml范围内呈线性。虽然钍（IV）和二氧化铀（II）的存在会干扰彼此的测定，但当它们同时存在时，9.28×10⁻¹ - 9.28 μg/ml的钍（IV）和9.52×10⁻¹ - 9.52 μg/ml的二氧化铀（II）可以使用导数光谱同时测定。