Integral-multilayer analytical element for analysis of...

Details Integral-multilayer analytical element for analysis of... Integral-multilayer analytical element for analysis of...

2006-04-04

2006-04-04

Warden, Jill (Department: 1743)

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

C422S051000, C422S051000, C422S083000, C422S086000, C422S087000

Reexamination Certificate

active

07022285

ABSTRACT:
An integral multilayer analytical element for analysis of ammonia or ammonia-producing substance is provided, which comprises a thin liquid blocking layer having a comparative facility with a thicker liquid blocking layer and is stably fabricated on a common production line employed for different type of slides.In the integral multilayer analytical element for analysis of ammonia or ammonia-producing substance comprising a transparent support, an indicator layer containing an indicator which produces a detectable change by gaseous ammonia, a liquid blocking layer permitting a gaseous ammonia to pass through, a reagent layer containing an alkaline buffering agent and optionally a reagent capable of reacting with said ammonia-producing substance to produce ammonia, and a spreading layer, adhesively laminated in this order, the improvement which comprises that said liquid blocking layer is composed of at least two porous membranes.

REFERENCES:
patent: 5008078 (1991-04-01), Yaginuma et al.
patent: 5198335 (1993-03-01), Sekikawa et al.
patent: 5286624 (1994-02-01), Terashima et al.
patent: 6395325 (2002-05-01), Hedge et al.

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