Journal
ANALYTICAL LETTERS
Volume 43, Issue 10-11, Pages 1723-1733Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00032711003653825
Keywords
Atomic emission; Cobalt; Multiple lines; Tungsten coil atomizer
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Funding
- National Science Foundation
- Department of Homeland Security through the joint Academic Research Initiatives [NSF CBET 0736214, DHS 2008-DN-077-ARI020-03]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [07/57564-2]
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A simple tungsten coil atomic emission device is used for the determination of Co in a polluted water sample. Multiple cobalt emission lines in the 340.5 to 352.7 nm range are detected simultaneously. Limits of detection at five different wavelengths ranged between 20 and 70 ng Co in a 25 mu L sample volume. Summing the signals for the five different Co emission lines improves the detection limit to 10 ng. The combination of the five lines also results in improved precision (2.2% relative standard deviation for a 4 mg/L Co solution) and accuracy (102% for a polluted water reference material).
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