Home
Resources
Publications
Use of the Triiodide-Hexadecylpyridinium Chloride Micellar System for the Kinetic Determination of Tungsten (VI)

Use of the Triiodide-Hexadecylpyridinium Chloride Micellar System for the Kinetic Determination of Tungsten (VI)

F Shemirani, A R Asghari, M A Hajimoosa

Talanta. 1999 Apr;48(4):879-83.

PMID: 18967530

Abstract:

The associate formed by triiodide ion and hexadecylpyridinium chloride (cetylpyridinium chloride (CPC)) micelles was used to enhance the kinetic spectrophotometric determination of W(VI) by its catalytic action on the oxidation of iodide with hydrogen peroxide in an acidic medium. The reaction was monitored spectrophotometrically by measuring the increase in absorbance of I(3)(-)-CPC associate at 525 nm by the fixed-time method of 3 min from initiation of the reaction. The micellar medium allowed the determination of W(VI) at concentrations between 4 and 90 ng ml(-1) with a detection limit of 2.4 ng ml(-1) (i.e. about 12-13 times lower than those of methods implemented in aqueous media). The relative standard deviation for nine replicate analyses was 0.03% for 76.6 ng ml(-1) of W(VI). The proposed method was applied to the determination of W(VI) in aqueous extracts of soil sample with no prior separation.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP13283017	Tungsten(VI) chloride		13283-01-7	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: