A miniature planar magnetron glow discharge source for analysis of submicroliter volume aqueous samples using atomic emission spectroscopy

被引：5

作者：

Raghani, AR ^{[1
]}

Smith, BW ^{[1
]}

Winefordner, JD ^{[1
]}

机构：

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

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 1996年 / 51卷 / 04期

关键词：

atomic emission spectroscopy; miniature planar magnetron glow discharge source;

D O I：

10.1016/0584-8547(95)01428-4

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A miniature planar magnetron glow discharge source with a chamber volume of 60 mi has been designed and evaluated for the analysis of less than 1 mu l of aqueous samples by atomic emission spectroscopy. Limits of detection for magnesium, silver, boron, europium and copper in the presence of a magnetic field are observed to be 3 to 40 times lower than for the source without a magnetic field when the measurements are made under the compromised discharge conditions for each type of source. Emission intensity in the presence of the magnetic field is found to increase as a square function of the discharge current. The improved detection limits for the magnetically enhanced glow discharge source are attributed to the increased current density of the discharge in the presence of the magnetic field which formed a plasma ring localizedabove the cathode surface. An RSD in the range 15-25% is observed for these measurements.

引用

页码：399 / 409

页数：11

共 24 条

[1] BURST RADIO-FREQUENCY EXCITED PULSED HOLLOW-CATHODE LAMP [J].