Electricity: measuring and testing – Electrolyte properties – Using a ph determining device
Patent
1989-02-21
1990-03-27
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Electrolyte properties
Using a ph determining device
364497, 204406, 204407, 204408, 204400, G01N 2746
Patent
active
049124170
ABSTRACT:
A microprocessor-controlled pH and ion concentration meter is disclosed with improved calibration and testing procedures. For calibration (standardization), the meter stores number pairs (pX.sub.a, E.sub.a), (pX.sup.b, E.sub.b) where the pX values may be pH values (e.g., 4.00 and 7.00) and the E values are expressed in mV/deg K. When multiple standard values are stored, remeasuring one (e.g., replacing E.sub.a1 by E.sub.a2) can be used to update the others (e.g., E.sub.b1 to E.sub.b2) without remeasurement by applying the formula:
REFERENCES:
patent: 4353867 (1982-10-01), Luzzana
patent: 4649028 (1987-03-01), Kaltenbach et al.
patent: 4668346 (1987-05-01), Entwistle
patent: 4779446 (1988-10-01), Rowland
Corning Science Products, "pH/Ion Meter 135 Instruction Manual" (Cat. No. 477332, Rev. B, 6/79).
Fisher Scientific, "Instructions Fisher Accumet Model 925 Meter" (Rev. A Published Mar., 1987; bulletin 7-1019-n).
Frola Frank R.
Frollini, Jr. Dominick
Gibboney Dennis A.
Schneider John T.
Doernberg Alan M.
Eisenzopf Reinhard J.
Fisher Scientific Company
Solis Jose M.
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