Tungsten coil devices in atomic spectrometry: absorption, fluorescence, and emission.
In this work, tungsten coil (W-Coil) devices are used as atomizers for electrothermal atomization atomic absorption spectrometry (ETAAS), electrothermal atomization laser excited atomic fluorescence spectrometry (ETA-LEAFS), and electrothermal vaporization inductively coupled plasma atomic emission spectrometry (ETV-ICP-AES). For most cases in ETAAS and ETA-LEAFS, limits of detection (LODs) using the W-Coil are within a factor of ten of those observed with commercial graphite furnace systems. LOD for Cd by W-Coil AAS is 10 pg, while LODs for As, Se, Cr, Sb and Pb by W-Coil LEAFS are 950, 320, 1400, 330, and 160 fg, respectively. The compact W-Coil device makes it an ideal atomizer for portable atomic spectrometry instrumentation, especially when coupled with a miniature charge coupled device spectrometer. Alternatively, the atomizer can be used as an inexpensive, modular add-on to an existing commercial ICP-AES system; and the thermal separation of Pb with interference elements Al, Mn, and Fe is demonstrated.
Hou
X
X
Department of Chemistry, Wake Forest University, Winston-Salem, NC 27109, USA.
Levine
K E
KE
Salido
A
A
Jones
B T
BT
Ezer
M
M
Elwood
S
S
Simeonsson
J B
JB
D005453:Fluorescence; D007834:Lasers; D008670:Metals / Q000032:analysis; D013054:Spectrophotometry, Atomic / Q000295:instrumentation*; D014414:Tungsten
D008670:Metals; D014414:Tungsten