title: Selective preconcentration of thallium on modified silica gel for its determination by flame emission and absorption spectrometry.
abstract: Thallium (0.02-20 mug) was successfully preconcentrated on silica gel C18 from 0.1M hydrochloric acid in the presence of various cationic surfactants as ion pairs with tetrachlorothallate(III), and subsequently eluted with 96% ethanol. Of various atomic spectrometric procedures considered, emission spectrometry in a nitrous oxide-acetylene flame is suitable for the final determination of thallium in plants, this is more sensitive for thallium than flame atomic absorption spectrometry.
authors.affiliation: Department of Analytical Chemistry, Masaryk University, Kotlárská 2, 611 37 Brno, Czech Republic.
authors.forename: V
authors.initials: V
authors.lastname: Otruba
authors.forename: J
authors.initials: J
authors.lastname: Stepánková
authors.forename: L
authors.initials: L
authors.lastname: Sommer