Integral multilayer analytical element for the analysis of ammon

Details Integral multilayer analytical element for the analysis of ammon Integral multilayer analytical element for the analysis of ammon

1984-05-11

1985-10-22

Turk, Arnold

Chemistry: analytical and immunological testing

Nitrogen containing

Amine and quaternary ammonium

422 56, 422 58, 435 12, 435 23, 435805, 435807, 436170, C12Q 158, G01N 3352, G01N 3362, G01N 3370

Patent

active

045489068

ABSTRACT:
An integral multilayer analytical element for the analysis of ammonia or an ammonia forming substrate in a liquid sample is disclosed. The element comprises a transparent support on which an indicator layer for ammonia, a liquid blocking layer, a reagent layer incorporated with a reagent which may react with the substrate to form ammonia, and a spreading layer, are integrally superposed in this order. The improvement is that the liquid blocking layer is made of a porous material which is permeable to ammonia but substantially impermeable to liquids.

REFERENCES:
patent: Re30267 (1980-05-01), Bruschi
patent: 3873269 (1975-03-01), Kraffczyk et al.
patent: 3992158 (1976-11-01), Przybylowicz et al.
patent: 4223089 (1980-09-01), Rothe et al.

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