Maya, F and Estela, JM and Cerda, V, Improving the chemiluminescence-based determination of sulphide in complex environmental samples by using a new, automated multi-syringe flow injection analysis system coupled to a gas diffusion unit, Analytica Chimica Acta, 601, (1) pp. 87-94. ISSN 0003-2670 (2007) [Refereed Article]
Copyright 2007 Elsevier B.V.
A new, completely automated multi-syringe flow injection analysis (MSFIA) system coupled to a gas diffusion unit (GDU) was used for the chemiluminescence (CL)-based determination of sulphide ion in various types of environmental matrices with a high sensitivity and selectivity, and the need for no manual sample pretreatment. Sulphide ions are transferred as H2S from the donor channel of the GDU to its acceptor channel (AC) through a hydrophobic membrane inserted between the two streams. The solution held in AC replaces the initial sample matrix, which may contain a wide variety of interferents, with one suitable for the CL determination of the analyte. Once sulphide ions have been isolated from the sample matrix, they are determined by their catalytic action on the luminol/H2O2 chemiluminescent reaction system. The influence of various chemical and hydrodynamic variables is discussed and the performance of the proposed system compared with that of existing flow systems for the same purpose. Under the operating conditions used, the proposed method features a linear working range of 0.02–2 mg L−1, a limit of detection (3σblank) of 0.003 mg L−1, a throughput of 20 samples h−1 and a coefficient of variation of 2.4% (n = 10) for a 1 mg L−1 sulphide concentration. The method was used to determine sulphide in leachates and various types of water samples.
|Item Type:||Refereed Article|
|Keywords:||flow analysis, chemiluminescence, multi-syringe flow injection analysis, gas diffusion, chemiluminescence detection, luminol, sulphide, environmental samples|
|Research Division:||Chemical Sciences|
|Research Group:||Analytical Chemistry|
|Research Field:||Flow Analysis|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding Knowledge|
|Objective Field:||Expanding Knowledge in the Chemical Sciences|
|UTAS Author:||Maya, F (Mr Fernando Maya Alejandro)|
|Web of Science® Times Cited:||58|
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