Item Details

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