Dry analytical element and process for producing the same

Details Dry analytical element and process for producing the same Dry analytical element and process for producing the same

1989-03-10

1990-09-11

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 57, 435 28, 435805, 436135, 436904, 436169, 436170, G01N 3300, G01N 2177, C12Q 128

Patent

active

049561464

ABSTRACT:
A dry analytical element for use in detecting a specific component contained in a liquid, which element comprises one or more water permeable layers provided on a water impermeable support, at least one layer of the water-permeable layers containing a composition capable of interacting with said specific component contained in said liquid. The composition contains a leuco dye and a dispersion containing said leuco dye is incorporated in the water-permeable layer, which is formed by dissolving the leuco dye in a hydrophobic solvent containing an aliphatic higher alcohol and dispersing the resulting solution in a hydrophilic medium. The leuco dye has the formula: ##STR1## where R.sup.1 represents an unsubstituted or substituted aryl group, R.sup.2 represents an unsubstituted or substituted alkyl group, and R.sup.3 represents an unsubstituted or substituted aryl group. A process for producing said dry analytical element is also disclosed.

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patent: 4260393 (1981-04-01), Gibson
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patent: 4732736 (1988-03-01), Kobayashi et al.
patent: 4780411 (1988-10-01), Piejko et al.
patent: 4812399 (1989-03-01), Mauck et al.

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