Quotient of quantities of the same kind for different components within the same system.
PAC, 1985, 57
, 1299. (Review of plasma deposition applications: preparation of optical waveguides
) on page 1309 [Terms
PAC, 1996, 68
, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)
) on page 989 [Terms