Sensitive pH indicator
US4062876A · kind A · utility
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1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1976 |
| Grant date | Dec 13, 1977 |
| Priority date | — |
| Expiry date | May 3, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N31/221
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Process of preparing reduced aniline blue pH indicator for use in detecting presence of microorganisms in culture media. The process involves reducing aniline blue by the sequential addition of sodium thioglycollate. The reduced aniline blue indicator may be used in certain media designed for use in the cards and wells of the mechanism described in applications AUTOMATED MICROBIAL ANALYZER and MACHINE AND PROCESS FOR READING CARDS CONTAINING SPECIMENS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.