Quantification of ultra-trace molybdenum using 4-amino-5-hydroxynaphthalene-2,7-disulfonic acid monosodium salt as a chromogenic probe

被引：3
|
作者：
Nagaraja, Padmarajaiah [1 ]
Krishna, Honnur [1 ]
Shivakumar, Anantharaman [1 ]
Paulas, Anthonydas Robert [1 ]
Rangappa, Dinesh [2 ]
机构：
[1] Univ Mysore, Dept Studies Chem, Mysore 570006, Karnataka, India
[2] Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Nano Energy Mat Grp, Tsukuba, Ibaraki 3050012, Japan
来源：
ANALYTICAL BIOCHEMISTRY | 2011年 / 411卷 / 02期
关键词：
ATOMIC-ABSORPTION-SPECTROMETRY; SPECTROPHOTOMETRIC DETERMINATION; ACTIVATED CARBON; SAMPLES; URINE;
D O I：
10.1016/j.ab.2010.12.021
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
A simple, ultrasensitive, nonextractive spectrophotometric method has been developed for the assay of Mo(VI), which involves Mo-catalyzed oxidation of 4-amino-5-hydroxynaphthalene-2,7-disulfonic acid monosodium salt (AHNDSA) by H2O2 in acetic acid/sodium acetate buffer yielding an intense pink colored product with lambda(max) of 540 nm. Beer's law is obeyed in the range of 10-240 ng/ml with molar absorptivity of 3.0137 x 10(5) L mol(-1) cm(-1). The LOD and LOQ were found to be 0.7696 and 2.565 ng/ml, respectively. The applicability of the method toward water and biological samples was tested and statistically compared with a reference method. (C) 2010 Elsevier Inc. All rights reserved.
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页码：300 / 302
页数：3
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