Determination of lithium at ultratrace levels in biological fluids by flame atomic emission spectrometry. Use of first-derivative spectrometry
- 1 January 1992
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 117 (8) , 1373-1376
- https://doi.org/10.1039/an9921701373
Abstract
The use of zero-order and first-derivative flame emission spectrometry has been investigated for the determination of basal concentrations of lithium in serum and urine at the µg dm–3 level. No significant matrix effect was observed; however, it was necessary to make use of background correction techniques. Two or three wavelength measurements and first-derivative spectrometry were used for this purpose; both methods gave similar results. Detection limits for serum of approximately 0.09 µg dm–3 were found by both zero-order and first-derivative emission measurements, while normal lithium levels were found to be 29.3 and 1.17 µg dm–3 for urine and serum, respectively.Keywords
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