Chemistry: analytical and immunological testing – Automated chemical analysis – With a continuously flowing sample or carrier stream
Patent
1992-03-19
1993-05-18
Housel, James C.
Chemistry: analytical and immunological testing
Automated chemical analysis
With a continuously flowing sample or carrier stream
436163, 436826, 422 681, G01N 3508, G01N 3116, G01N 3122
Patent
active
052120953
ABSTRACT:
A flow injection nonaqueous solvent neutralization titration process and system is provided. The predetermined quantity of a known titrant is used to derived calibration values based on different predetermined concentrations of a desired component in a sample. The quantity of the titrant agent in excess of an amount necessary to completely react with the sample is added and then subsequently the amount of the unreactant titrant agent is determined. From this value, the calibration values that have been stored, for example, in a look-up table can be used to determine the actual concentrations of the desired component in the sample. Alternatively, the sample can be mixed in a fluid carrier solution having a predetermined quantity of the titrant agent and then the resulting by-products of the reaction with the sample and the titrant can be inserted into a pH buffer solution so that the excess titrant will change the concentration ratio of the acids to bases and by measuring this change and comparing with the calibration values, the unknown concentration of the desired component in the sample can be discovered.
REFERENCES:
patent: 4269604 (1981-05-01), Snowden, Jr.
patent: 4654309 (1987-03-01), Mlinar et al.
patent: 5094817 (1992-03-01), Aoki et al.
patent: 5124042 (1992-06-01), Bredeweg et al.
Miki Kojiro
Ohkawa Hiromi
Takeichi Shinji
Bhat N.
Horiba Ltd.
Housel James C.
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