Separation and spectrophotometric determination of a cationic surfactant in water in the presence of an anionic surfactant with solvent-insoluble and-soluble membrane filters

Citation
S. Taguchi et al., Separation and spectrophotometric determination of a cationic surfactant in water in the presence of an anionic surfactant with solvent-insoluble and-soluble membrane filters, BUNSEKI KAG, 47(12), 1998, pp. 1035-1040
Citations number
11
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
BUNSEKI KAGAKU
ISSN journal
05251931 → ACNP
Volume
47
Issue
12
Year of publication
1998
Pages
1035 - 1040
Database
ISI
SICI code
0525-1931(199812)47:12<1035:SASDOA>2.0.ZU;2-F
Abstract
Two membrane filters, solvent insoluble and soluble, were applied to precon centration and spectrophotometric determinations of a cationic surfactant p resent as an ion associate with an anionic surfactant in environmental wate r. The ion associate in 100 cm(3) water sample was collected on a PTFE memb rane filter by filtration, and eluted with 2 cm(3) of methanol. The methano l solution was diluted to 15 cm(3) with water. Then a buffer solution (pH 9 ) and a methyl-orange solution were added to the solution followed by being made up to 25 cm(3) with water. The solution was filtered through a mixed cellulose ester membrane filter to collect the ion associate of the cationi c surfactant and methyl orange. The ion associate was dissolved in 5 cm(3) of DMF together with the membrane filter. The absorbance of the DMF solutio n was measured at 423 nm against a reagent blank. The recovery test for 10( -6) mol dm(-3) level of Zephiramine, a standard material of a cationic surf actant, was satisfactory. This method was applied to river-water samples co ntaining domestic waste.