Spectrophotometric determination of microamounts of thorium with thorin in the presence of cetylpyridinium chloride as surfactant in perchloric acid

被引：17

作者：

Khan, Muhammad Haleem ^{[1
]}

Hafeez, Muhammad ^{[1
]}

Bukhari, Syed Manzoor Hussain ^{[1
]}

Ali, Akbar ^{[2
]}

机构：

[1] Univ Azad Jammu & Kashmir, Dept Chem, Muzaffarabad, Pakistan

[2] Pakistan Inst Nucl Sci & Technol, Div Chem, Islamabad, Pakistan

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2014年 / 301卷 / 03期

关键词：

Spectrophotometric determination; Thorium; Thorin; CPC; Perchloric acid; CHROME AZUROL S; ARSENAZO-III; COLORIMETRIC DETERMINATION; ANALYTICAL-CHEMISTRY; SOLVENT-EXTRACTION; DISODIUM SALT; URANIUM; SEPARATION; REAGENT; SAMARIUM(III);

D O I：

10.1007/s10967-014-3201-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple and more sensitive spectrophotometric method is developed for determination of thorium using thorin as a chromogenic reagent in the presence of cetylpyridinium chloride (CPC) in perchloric acid. The reaction was instantaneous and complex was found stable for 168 h. A significant bathochromic shift was noted in the presence of CPC. The determination range was enhanced from 25 to 30 mu g mL(-1) with molar absorptivity of 2.95 x 104 L mol(-1) cm(-1) at 25 +/- A 5 A degrees C. Sandell's sensitivity was calculated to be 6.8 ng cm(-2) at 581 nm. Relative standard deviation was reduced from 4.25 to 2.5. The interference of Ni2+, Mn2+, Sn4+, phosphate, EDTA, sulphate and tartrate has been reduced significantly in the presence of surfactant. The validity of the proposed method was tested by determining thorium in Certified Reference Materials.

引用

页码：703 / 709

页数：7

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