title: Spectrophotometric determination of traces of arsenic.
abstract: Arsenic(III) is extracted into carbon tetrachloride from 3.5M sulphuric acid that is 0.8M in potassium iodide. 8-Mercaptoquinoline and acetone are added to the organic extract and the absorbance of the arsenic(III)-8-mercaptoquinolinate formed is measured at 380 nm. Repeating the extraction procedure highly increases the selectivity of the method; only tin(II) interferes with the determination.
authors.affiliation: Laboratory for Analytical Chemistry Heyrovský Polarographic Institute Prague 1, Jilská 16, Czechoslovakia.
authors.forename: V
authors.initials: V
authors.lastname: Stará
authors.forename: J
authors.initials: J
authors.lastname: Starý