Steam sterilization indicator compositions

Details Steam sterilization indicator compositions Steam sterilization indicator compositions

1996-09-27

1999-06-29

Alexander, Lyle A.

Chemistry: analytical and immunological testing

Optical result

Including reagent preparation

436 1, 422 61, 422119, G01N 2178

Patent

active

059168161

ABSTRACT:
A steam sterilization indicator composition comprising a bismuth compound, a sulfur source, and a compound capable of generating alkaline conditions when exposed to steam; wherein when exposed to steam the composition noticeably changes color and when exposed to dry heat either does not change color or changes color to one that is markedly different from the color formed when the same composition is exposed to steam.

REFERENCES:
patent: 3360338 (1967-12-01), Edenbaum
patent: 3360339 (1967-12-01), Edenbaum
patent: 3386807 (1968-06-01), Edenbaum
patent: 3471422 (1969-10-01), Edlein et al.
patent: 4514361 (1985-04-01), Hirsch
patent: 5057433 (1991-10-01), Douglas
patent: 5064576 (1991-11-01), Suto
Billmeyer & Saltzman, Principles of Color Technology, 2nd Ed., pp. 62-65; 67-92 (1981).

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