Analytical method and multilayer element for total ionic iron determination
US4789525A · kind A · utility
2Cited by
6References
5Claims
0Family size
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Key dates
| Filing date | Jun 22, 1987 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Jun 22, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/90
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dry multilayer analytical element for determination of total ionic iron is disclosed. The element includes a dye which complexes with Fe.sup.+2. The dye has the structure ##STR1## R.sup.1 represents an electron donating group; or R.sup.1, together with the carbon to which it is attached, represents sufficient atoms to form a cyclic electron donating group fused to the phenyl group to which R.sup.1 is attached; PA1 R.sup.2 represents an electron withdrawing group; and PA1 R.sup.3 represents H, Cl, F, Br or OR.sup.4 wherein R.sup.4 represents a hydrocarbon having from 1 to 20 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.