Reference liquid for blood gas equipment
US4163734A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1978 |
| Grant date | Aug 7, 1979 |
| Priority date | — |
| Expiry date | Jan 5, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/108331
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A stable synthetic water based reference liquid for quality control and/or calibration of blood gas measuring equipment, said liquid being enclosed in a gas-tight container and containing HCO.sub.3.sup.- ions, H.sup.+ ions, CO.sub.2 gas, and O.sub.2 gas plus an additional pH buffer system different from the pH buffer system constituted by the HCO.sub.3.sup.- ions and the CO.sub.2 gas, said liquid showing, at a fixed temperature, known pH, pCO.sub.2 and pO.sub.2 values, said liquid additionally containing oxygen reversibly contained in a dispersed non-proteinaceous organic substance which shows higher solubility for oxygen than does water, and, optionally, a coloring component showing maximum or significant absorption at about 500 nm, said organic substance being PA0 (a) a water-insoluble organic substance in which O.sub.2 l is soluble to an extent of at least 12% by volume at 1 atmosphere oxygen pressure and 25.degree. C., said water-insoluble substance being a liquid of lipoid character emulsified in a liquid-in-water type emulsion, in the water base of the reference liquid, or a solid suspended in the water base of the reference liquid, or PA0 (b) an oxygen complex-forming metal …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.