Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1986-07-07
1991-08-20
Johnston, Jill
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
422 73, 422 79, 436 62, 436 66, 436 68, 436164, G01N 3349
Patent
active
050413872
ABSTRACT:
In order to simplify the operation for determination of the acid-base status of blood, composed of the values for pH, pCO.sub.2 and the base excess BE, the base excess BE is determined through measurement of the pH-value at a pCO.sub.2 of about 0 mn Hg. The pH-values may be determined photometrically, in which case the indicator solution for measuring the actual blood-pH is an aqueous solution of 40 micromol/l bromthymol blue plus 0.2 g/l sodium dodecylsulfate plus 1% ethanol; and for measurement of the base excess BE is an aqueous solution of 65 micro mol/l naphtholphthalein plus 0.2 g/l sodium dodecylsulfate plus 15% dimethylsulfoxide, which are measured at a wavelength of 635 nm. If desired, one may use a single solution for measuring both actual blood-pH as well as the base excess BE, composed of 16 micromol/l bromthymol blue plus 34 micromol/l naphtholphthalein plus 0.15 g/l sodium dodecylsulfate, which is measured at 615 nm wavelength.
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Wolf Hans U.
Zander Rolf
Johnston Jill
Striker Michael J.
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