Colorimetric indicators for determining ph of motor oil
Abstract
Abstract THE PH OF A NON-AQUEOUS SYSTEM WHICH, NORMALLY, ON CONTACT OF A PH COLOR INDICATOR, DOES NOT SHOW A DETECTABLE CHANGE IN THE COLOR OF THIS INDICATOR, IS COLORIMETRICALLY MEASURED BY USE OF A TREATED SOLID ABSORBENT CARRIER CONTAINING ABSORBED THEREON A SUITABLE PH COLOR INDICATOR AND A NON-AQUEOUS, SUBSTANTIALLY NON-VOLATILE LIQUID SOLVENT COMMON TO SAID INDICATOR AND SAID SYSTEM, BY BRINGING THE NON-AQUEOUS SYSTEM IN CONTACT WITH THE CARRIER. IN A PREFERRED EMBODIMENT, A METHOD OF INDICATING THE PH OF A MOTOR OIL IS DESCRIBED WHICH CONSISTS IN CONTACTING THE USED MOTOR OIL WITH A PAPER WHICH HAS PREVIOUSLY BEEN TREATED WITH A PH COLOUR INDICATOR SOLUBLE IN A NON-IONIC SOLVENT AND A SURFACE-ACTIVE AGENT WHICH IS A NON-IONIC SOLVENT FOR SAID INDICATOR AND SAID MOTOR OIL.
Inventors
- 👤 John Pickup
- 👤 Theodorus G Brandts
- 👤 Joseph A Lichtenberger
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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