Method for detecting cations in a test sample utilizing chromogenic cryptahemispherands
US4859606A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 15, 1987 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Apr 15, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/84
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention resides in the discovery of a class of compounds defined herein as "chromogenic cryptahemispherands" useful for the measurement of ions, in particular, ions in aqueous solution, which have the structure ##STR1## wherein: R, same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl; PA0 R', same or different, is lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl; PA0 R", same or different, is hydrogen, lower alkyl, lower alkylidene, lower alkenyl, allyl or aryl; PA0 Q is a chromogenic moiety capable of providing the appearance of or change in color, or which is otherwise capable of providing a detectable response in the presence of a particular cation; PA0 a, b, m and n, same or different, are 1 to about 3; and x, y, same or different, are 1 to about 4. A test device utilizing one or more of the compounds for performing such measurements is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.