DISCONTINUOUS FLOW ANALYSIS INBUILT QUALITY ASSURANCE FOR FLOW BASED CHEMICAL ANALYSIS

T. Cardwell; R. Cattrall; B. Kreiger; R. Peachey; J. Petty; G. Scollary; M. Selby; D. Sweatman

doi:10.2116/analsci.7.Supple_641

DISCONTINUOUS FLOW ANALYSIS

INBUILT QUALITY ASSURANCE FOR FLOW BASED CHEMICAL ANALYSIS

T. Cardwell, R. Cattrall, B. Kreiger, R. Peachey, J. Petty, G. Scollary, M. Selby, D. Sweatman

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Keywords: Discontinuous flow analysis, incremental methods, chloride in water, quality assurance

JOURNAL FREE ACCESS

1991 Volume 7 Issue Supple Pages 641-644

DOI https://doi.org/10.2116/analsci.7.Supple_641

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Abstract

Discontinuous Flow Analysis (DFA) was applied to the determination of chloride in water in the range 60-180mg/l, using a three step, four plateau cam profile, chloride ISE sensor and single internal standard. Duplicate measurements generated an eight row matrix of calculated sample concentrations, system slopes and Nernst parameters. Control charts were used to identify trends during the measurement, and to estimate a tolerance specific for each sample. The potential of DFA for the real time verification of the analytical measurement is discussed.

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