Concentration measuring method

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Chemical analysis

Reexamination Certificate

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C702S019000, C702S022000, C435S007100, C435S287200, C073S861070, C250S253000

Reexamination Certificate

active

07054759

ABSTRACT:
A concentration measuring method includes selecting a calibration curve optimum for computing the concentration of a measurement target substance from a plurality of calibration curves based on an output from a reaction system containing the target substance and a reactant capable of reacting with the target substance, and computing the concentration of the target substance based on the optimum calibration curve and the output. Each of the calibration curves is prepared based on a plurality of outputs generated upon lapse of a same reaction time from a plurality of standard reaction systems each containing a standard reagent of a known different concentration and the reactant. The plurality of calibration curves differ from each other in reaction time based on which the calibration curves are prepared.

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patent: 2003/0113713 (2003-06-01), Glezer et al.
patent: 2004/0053322 (2004-03-01), McDevitt et al.
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patent: WO 02/29015 (2002-04-01), None
EPA-Method 9014, ‘Hazard Waste Test: Titrimeteric and Manual Spectrophotometeric Determinative Methods for Cyanide’, Dec. 1996, EPA Publication, pp. 9014-1 to 9014-7.
Khan et al. ‘Determination of Trace Amounts of Copper (II) by Using Catalytic Redox Reaction between Methylene Blue and Ascorbic Acid’, Oct. 2001, Japan Society for Analytical Chemistry Publication, vol. 17, pp. 1195-1197.

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