LASER-EXCITED ATOMIC FLUORESCENCE IN A PULSED HOLLOW-CATHODE GLOW-DISCHARGE

被引：34

作者：

GLICK, M ^{[1
]}

SMITH, BW ^{[1
]}

WINEFORDNER, JD ^{[1
]}

机构：

[1] UNIV FLORIDA,DEPT CHEM,GAINESVILLE,FL 32611

来源：

ANALYTICAL CHEMISTRY | 1990年 / 62卷 / 02期

关键词：

D O I：

10.1021/ac00201a014

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A pulsed glow discharge with low background noise is evaluated as an atom reservoir for laser-induced atomic fluorescence spectroscopy. Aqueous solutions are dried in graphite electrodes that are used as disposable hollow cathodes. Atomic vapor is produced in a flowing-gas glow discharge with a water-cooled cathode holder. A dye laser triggers a switching circuit that pulses the glow discharge, and fluorescence measurements are made 100 μs after the discharge is extinguished. The atomic population Is large during this dark period, while the background emission is negligible. Linear calibration curves are obtained by nonresonance fluorescence for two elements, Pb and Ir. The detection limits for Pb are 100 pg/mL and 500 fg, and for Ir are 6 ng/mL and 20 pg. The experimental detection limit for Pb is compared to the intrinsic detection limit. © 1990, American Chemical Society. All rights reserved.

引用

页码：157 / 161

页数：5

共 8 条

[1]

ALKEMADE CTJ, 1986, ANAL APPLICATIONS LA, pCH4

[2] APPLICATION OF CATHODIC SPUTTERING TO PRODUCTION OF ATOMIC VAPORS IN ATOMIC FLUORESCENCE SPECTROSCOPY [J].