Liquid chromatographic determination of water

Details Liquid chromatographic determination of water Liquid chromatographic determination of water

1988-07-18

1990-11-13

Warden, Robert J.

Chemistry: analytical and immunological testing

Determination of water

436 40, 436140, 436161, 436164, 436166, 210656, G01N 2175, G01N 3074, G01N 3318

Patent

active

049701703

ABSTRACT:
A sensitive method for the determination of water in the presence of common interferences is presented. The detection system is based on the effect of water on the equilibrium which results from the reaction aryl aldehydes, such as cinnamaldehyde and methanol in the eluent to form cinnamaldehyde dimethylacetal, plus water. This equilibrium is shifted in a catalytic atmosphere of a hydrogen ion form past column reactor. The extent of the shift and the resulting change in absorbance are proportional to the amount of water present.

REFERENCES:
patent: 2844025 (1958-07-01), Joyce et al.
patent: 3118735 (1964-01-01), Favre et al.
patent: 3355367 (1967-11-01), Marsh
patent: 3753656 (1973-08-01), Matson et al.
patent: 4696904 (1987-09-01), Stevens et al.
Stevens et al., Anal. Chem., 59, 1716-1720, (1987).
Thompson et al., Anal. Chem., 42, 1474-1477, (1970).

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