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A Sensitive Method for the Determination of Silicon by Molecular Absorption Spectroscopy

โœ Scribed by A.C. Basak; K.C. Ghosh; J.K. Sircar; A.R. Paul; L.P. Pandey; S. Bhattacharjee

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
63 KB
Volume
54
Category
Article
ISSN
0026-265X

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โœฆ Synopsis

A sensitive molecular absorption spectrophotometric (MAS) method has been developed for the estimation of silicon in iron and steel samples. The method is based on the typical property of silicon to form molybdosilicic acid in the acid medium in which 1 silicon atom binds 12 molybdenum atoms. The molybdosilicic acid is extracted by n-butanol and the attached molybdenum is stripped and back extracted into aqueous phase using 1:1 NH 4 OH. The stripped molybdenum is determined using a sensitive MAS method involving molybdenum-pyrocatecholviolet (PCV)-Cetyltrimethylammoniumbromide (CTAB) ternary ion association complex (1). Phosphorus and arsenic interfere significantly but may be masked with tartaric acid.

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โœ K. de Groot; J.C.M. Reijnen; H.J. Hoenders ๐Ÿ“‚ Article ๐Ÿ“… 1969 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 255 KB

As pointed out by van Es and Bont (1, 2) absorption optics with an electronic scanning system used in connection with the analytical ultracentrifuge have certain advantages for the determination of molecular weights. These authors have already carried out measurements at exactly the meniscus and exa