Spectrophotometric determination of trace amounts of cadmium using rt 2-nitrobenzenediazo aminoazobenzene

Authors
Gao, HW Tao, M
Citation
Hw. Gao et M. Tao, Spectrophotometric determination of trace amounts of cadmium using rt 2-nitrobenzenediazo aminoazobenzene, I J CHEM A, 40(7), 2001, pp. 780-784
Citations number
16
Categorie Soggetti
Chemistry
Journal title
INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY
ISSN journal
03764710 → ACNP
Volume
40
Issue
7
Year of publication
2001
Pages
780 - 784
Database
ISI
SICI code
0376-4710(200107)40:7<780:SDOTAO>2.0.ZU;2-6
Abstract
The spectral correction technique has been applied for the determination of cadmium using m-nitrobenzenediazoaminoazobenzene (m-NBDA). The composition ratio, real absorptivity and stepwise stability constant of the Cd-m-NBDA complex have been studied. The ratio of Cd to m-NBDA is found to be 1:3, it s cumulative stability constant is 9.30x10(18) and its real absorptivity is 1.36x10(5) 1 mol(-1) cm(-1) at 460 nm. Beer's law is obeyed over the range of 0 - 25 mug Cd(II)/25ml, the detection limit of cadmium is found to be 0 .006 mg/l and the relative standard deviation is 4.5%.