SPECTROPHOTOMETRIC FLOW-INJECTION DETERMINATION OF LEAD IN PORT-WINE USING IN-LINE ION-EXCHANGE CONCENTRATION

Authors
LOPES TIMS RANGEL AOSS SARTINI RP ZAGATTO EAG
Citation
Tims. Lopes et al., SPECTROPHOTOMETRIC FLOW-INJECTION DETERMINATION OF LEAD IN PORT-WINE USING IN-LINE ION-EXCHANGE CONCENTRATION, Analyst, 121(8), 1996, pp. 1047-1050
Citations number
12
Categorie Soggetti
Chemistry Analytical
Journal title
Analyst → ACNP
ISSN journal
00032654
Volume
121
Issue
8
Year of publication
1996
Pages
1047 - 1050
Database
ISI
SICI code
0003-2654(1996)121:8<1047:SFDOLI>2.0.ZU;2-C
Abstract
A flow injection system with in-line ion exchange is proposed for the spectrophotometric determination of lead in Port wine, A Chelex-100 re sin mini-column (200-400 mesh) is used for lead concentration, and the chromogenic reaction is based on the formation of a ternary complex b etween lead, Malachite Green and iodide, Forty-five digested wine samp les can be run per hour (25-500 mu g l(-1) Pb) and results are compara ble to those obtained by ETAAS. Other features are the measurement pre cision (RSDs lower than 2.6%), a detection limit of 12 mu g l(-1) and a sampling rate of 45 h(-1).