Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/19743
Title: Determination of lead in fine participates by slurry sampling electrothermal atomic absorption spectrometry
Authors: Yu, JC
Ho, KF
Lee, SC 
Issue Date: 2001
Source: Fresenius' journal of analytical chemistry, 2001, v. 369, no. 2, p. 170-175 How to cite?
Journal: Fresenius' Journal of Analytical Chemistry 
Abstract: A simple method for determining lead in fine participates (PM2.5) by using electrothermal atomic absorption spectrometry (ETAAS) has been developed. Particulates collected on Nuclepore filter by using a dichotomous sampler were suspended in diluted nitric acid after ultrasonic agitation. The dislodging efficiency is nearly 100% after agitation for 5 min. In order to study the suspension behavior of PM2.5 in solvents, a Brookhaven ZetaPlus Particle Size Analyzer was used to determine the particle size distribution and suspension behavior of air particulates in the solvent. The pre-digestion and modification effect of nitric acid would be discussed. Palladium was added as a chemical modifier and the temperature program of ETAAS was changed in order to improve the recovery. The slurry was introduced directly into a graphite tube for atomization. The metal content in the sample was determined by the standard addition method. In addition, a conventional acid digestion procedure was applied to verify the efficiency of the slurry sampling method. It offers a quick and efficient alternative method for heavy metal characterization in fine particulates.
URI: http://hdl.handle.net/10397/19743
ISSN: 0937-0633
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