Method for on-line analysis

Details Method for on-line analysis Method for on-line analysis

G - Physics

01

N

G01N 21/72 (2006.01) G01J 1/02 (2006.01) G01J 3/02 (2006.01) G01N 21/31 (2006.01) G01N 35/08 (2006.01)

Patent

CA 2172359

For the purpose of on-line analysis of analytes in a liquid medium to be tested in accordance with the addition method for calibration, a detector is supplied stepwise, in a continuously recurrent and automatable rhythm, with the followingliquid substances for detecting a signal characteristic of the analyte: a) an analyte-free solvent (I), which does not produce a signal, for the purpose of establishing the signal base line; b) the medium (II) which contains the analyte and may or may not have solvent (I) added in a constant mixing ratio, for the purpose of detecting the analyte signal; and c) a homogeneous mixture of (II) with a calibration solution (III), which is homogeneously miscible in any proportion with (II), in a constant mixing ratio (II):(III) for the purpose of detecting the additive analyte signal. Steps b) and c) may also be carried out in inverse order. The detected signals are evaluated as measurement data. For the purpose of checking the adequate chemicaland physical stability of (III) and the validity of the analysis, the said rhythm is interrupted by d) detecting the signal of a test solution (IV) for the purpose of checking the trueness of the system and is then continued as before.

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