Determination of Lead in Wine by the FIAS-FAAS Combination On-line Preconcentration System

Abstract

Abstract: Aflow-injection on-line preconcentration and seperation procedure for flame-AASwith a microwave digestion system is described for the determination of lead at μg/Llevels in wine.The sorbent extraction preconcentration system is a micro-column (50μL) with bonded silica groups C18 as the sorbent and DDCas the complexing agent.The wine samples were digested using hydrogen peroxide as a digestion oxidizer in the microwave digestion system.An enrichment factor of 100 and a detection limit (3σ) of 3.0μg/Lwere thereby obtained.The sample throughput was 33/h for a sample loading time of 90 s with RSD 1.8 %(n=11).The recoveries of lead added in wine were 95%~103%.

Key words: Lead, Wine, Microwave digestion, Flow injection on-line preconcentration, Flame AAS

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SUN Xiao-Juan, B. Welz M. Sperling. Determination of Lead in Wine by the FIAS-FAAS Combination On-line Preconcentration System[J]. Chem. J. Chinese Universities, 1996, 17(8): 1219.

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Determination of Lead in Wine by the FIAS-FAAS Combination On-line Preconcentration System

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