Analytical technique for quantitating acid/salt and base/salt sa

Details Analytical technique for quantitating acid/salt and base/salt sa Analytical technique for quantitating acid/salt and base/salt sa

1978-06-08

1980-04-22

Marcus, Michael S.

Chemistry: physical processes

Physical processes

Crystallization

73 611C, 210 24, 210 25, 210 31C, 210198C, 422 70, G01N 3104, G01N 2708

Patent

active

041993233

ABSTRACT:
Acid or alternately base species concentration in aqueous and non-aqueous samples is quantitated, in the presence of interfering ionic salts, using most preferably differential conductivity detection combined with ion-exchange derivatization, wherein characteristically the acid or base species is derivatized to water, and blended indistinguishably in a required aqueous carrier phase, and the interfering salt(s) is derivatized to a distinguishable hydroxide or acid derivative(s). Using the preferred mode of detector read-out, the calibrated peak of the conductimetric response of the salt derivative(s) is compared to the peak of the conductimetric response of the sample and the response differential is displayed and used to predict the acid or base species concentration. The salt(s) concentration (with some exceptions) may be simultaneously predicted since it is proportional to the first mentioned peak. The technique has utility with respect to acids and bases broadly, and most advantageously is used with respect to strong and moderately strong acids and bases of a pK.sub.a and pK.sub.b value, respectively, of about 2 or less.

REFERENCES:
patent: 2617766 (1952-11-01), Emmett et al.
patent: 2920398 (1975-11-01), Small et al.
patent: 3607083 (1971-09-01), Chowdhry
patent: 3897213 (1975-07-01), Stevens et al.
patent: 3915642 (1975-10-01), Small et al.
patent: 3918906 (1975-11-01), Small et al.
patent: 3920397 (1975-11-01), Small et al.
patent: 3923460 (1975-12-01), Parrott et al.
patent: 3925019 (1975-12-01), Small et al.
patent: 3926559 (1975-12-01), Stevens

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