title: Fluorescence characteristics of inorganic complexes in hydrochloric acid medium at liquid-nitrogen temperature.
abstract: A study of the low-temperature fluorescence characteristics of the ions of 55 elements in concentrated hydrochloric acid is reported. The spectral characteristics, effects of hydrochloric acid concentration and time, calibration linearity and sensitivity for Sb(III), Bi, Ce(III), Pb, Te(IV), Tl(I) and Sn(IV) have been investigated. Uranium(VI), copper(I) and antimony(V) also exhibit fluorescence under these conditions. The detection limits using a commercial spectrofluorimeter with modified sample cells are Sb(III), 10(-6)M; Bi(III), 10(-8)M; Ce(III), 10(-7)M; Pb, 10(-8)M; Te(IV), 10(-7)M; Tl(I), 10(-6)M; Sn(IV), 10(-4)M. The suitability of some inorganic acid solvents for clear glass formation at -196 degrees is also investigated.
authors.affiliation: Chemistry Department, Imperial College, London, S.W.7., England.
authors.forename: G F
authors.initials: GF
authors.lastname: Kirkbright
authors.forename: C G
authors.initials: CG
authors.lastname: Saw
authors.forename: T S
authors.initials: TS
authors.lastname: West