A multisyringe flow injection system (MSFIA) with spectrophotometric detection is proposed as a fast, robust and low-reagent consumption system for the determination of chloride (Cl⁻) in waters. The system is based in the classic reaction of Cl⁻ with Fe³⁺ and Hg(SCN)₂, but due to the hazardous properties of this last reagent, the proposed methodology has been developed with the aim to minimize the consumption of this one, consuming less than 0.05 mg of Hg for a Cl⁻ determination, being the system of this type with the lowest Hg consumption. The linear working range was between 1 and 40 mg L⁻¹ Cl⁻ and the detection limit was 0.2 mg L⁻¹ Cl⁻. The repeatability (RSD) was 0.8% for a 10 mg L⁻¹ Cl⁻ solution, and the injection throughput was 130 h⁻¹. The proposed system is compared with other chloride monitoring flow systems, this comparison is realized with a point of view of the equilibrium between the obtained analytical features and produced residues toxicity. The proposed system was applied to the determination of Cl⁻ in mineral, tap and well water.

Item Type:	Refereed Article
Keywords:	flow analysis
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)
ID Code:	137320
Year Published:	2008
Web of Science® Times Cited:	19
Deposited By:	Chemistry
Deposited On:	2020-02-10
Last Modified:	2020-04-30
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