Determination of lead in fine participates by slurry sampling electrothermal atomic absorption spectrometry

Jimmy C. Yu, K. F. Ho, Shuncheng Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

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 PM2.5in 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.
Original languageEnglish
Pages (from-to)170-175
Number of pages6
JournalFresenius' Journal of Analytical Chemistry
Volume369
Issue number2
Publication statusPublished - 1 Dec 2001

ASJC Scopus subject areas

  • Biochemistry

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