Compensated reference liquid

G - Physics – 01 – N

Patent

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150/1

G01N 27/00 (2006.01) G01N 27/416 (2006.01)

Patent

CA 1158966

ABSTRACT A reference liquid system for use with a chemical analyzer that has a plurality of ion selective electrodes comprises a plurality of reference liquids, each of which has a first salt component such that ions of a first element to be measured are present in a predetermined concentration, a second salt com- ponent such that ions of a second element to be measured are present in a pre- determined concentration, and an error compensation salt component present in a concentration effective to adjust (a) the activity coefficient factor and/or (b) the junction potential factor to reduce the error involved in use of the compensated reference liquid to less than fifty percent of the error involved in use of a corresponding uncompen- sated reference liquid.

382081

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