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Portable Tungsten Coil Atomic Emission and Atomic Fluorescence Spectrometry

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title
Portable Tungsten Coil Atomic Emission and Atomic Fluorescence Spectrometry
author
Gu, Jiyan
abstract
Tungsten Coil Atomic Emission Spectrometry is an ideal technique for field applications because of its simplicity, low cost, low power requirement and independence from cooling systems. A new, portable, compact design is reported here. The tungsten coil is extracted from a 24 V, 250 W commercial projector light bulb. The coil is housed in a small, aluminum cell. The emission signal exits from a small aperture in the cell, while the bulk of the blackbody emission from the tungsten coil is blocked. The resulting spectra exhibit extremely low background signals. The atomization cell, a single lens, and a small CCD-based spectrometer are mounted on a 1 × 6 × 30 cm ceramic base. The resulting system is robust and easily transported. A 400 W solid state power supply is employed to control the current through the coil. The whole system can be powered by a car battery and controlled with a laptop computer. Fifteen elements are determined with the system (Ba, Cs, Li, Rb, Cr, Sr, Eu, Yb, Mn, Fe, Cu, Mg, V, Al and Ga). The precision ranged from 4.3% to 8.4% relative standard deviation for repetitive measurements of the same solution. Detection limits were in the μ/L range. Accuracy was tested using standard reference materials for polluted water, peach leaves and tomato leaves.
subject
atomic
enviromental
instrumentation
pollution
portable
spectroscopy
contributor
Jones, Bradley T (committee chair)
Carlson, Eric D (committee member)
Hinze, Willie L (committee member)
Salam, Akbar (committee member)
Colyer, Christa L (committee member)
date
2011-02-16T21:42:35Z (accessioned)
2011-08-03T08:30:10Z (available)
2010 (issued)
degree
Chemistry (discipline)
embargo
2011-08-03 (terms)
identifier
http://hdl.handle.net/10339/30426 (uri)
language
en (iso)
publisher
Wake Forest University
type
Dissertation

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