@E01974@ of a cell in which the electrode on the left is a @S05917@ and the electrode on the right is the electrode in question.
Sources: Green Book, 2nd ed., p. 61 [Terms] [Book] PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 971 [Terms] [Paper]