title: UV light-emitting-diode photochemical mercury vapor generation for atomic fluorescence spectrometry.
abstract: A new, miniaturized and low power consumption photochemical vapor generation (PVG) technique utilizing an ultraviolet light-emitting diode (UV-LED) lamp is described, and further validated via the determination of trace mercury. In the presence of formic acid, the mercury cold vapor is favourably generated from Hg(2+) solutions by UV-LED irradiation, and then rapidly transported to an atomic fluorescence spectrometer for detection. Optimum conditions for PVG and interferences from concomitant elements were investigated in detail. Under optimum conditions, a limit of detection (LOD) of 0.01 μg L(-1) was obtained, and the precision was better than 3.2% (n = 11, RSD) at 1 μg L(-1) Hg(2+). No obvious interferences from any common ions were evident. The methodology was successfully applied to the determination of mercury in National Research Council Canada DORM-3 fish muscle tissue and several water samples.
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Hou
authors.forename: Xi
authors.initials: X
authors.lastname: Ai
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Jiang
authors.forename: Pengchi
authors.initials: P
authors.lastname: Deng
authors.forename: Chengbin
authors.initials: C
authors.lastname: Zheng
authors.forename: Yi
authors.initials: Y
authors.lastname: Lv