Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating
Patent
1978-04-04
1980-07-22
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
Vacuum arc discharge coating
G01N 2738
Patent
active
042138418
ABSTRACT:
A pH measuring instrument includes a specimen probe having parallel front and rear panels with a planar electrode mounted on each and electrically coupled to a meter movement. Each electrode includes a broad flat electrolytically active surface. The probe is so dimensioned that the active electrode surfaces are parallel an spaced apart a distance less than the gripping capacity between the thumb and forefinger of an operator. A specimen pH value is measured after initial electrode treatment including a dry wiping of the active electrode surfaces, a cleansing of the active electrode surfaces with a plastic filamentous abrasive sponge pad held in one hand and wrapped around both electrodes and an in situ specimen preconditioning. The probe is removed after specimen preconditioning has been attained, recleansed and reinserted in the specimen, after which an accurate pH value measurement is indicated at the meter.
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J & M Instruments Corp.
Kaplan G. L.
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