1. Group of four quantities characterizing the composition of a mixture with respect to the volume of the mixture (@M03713@, @A00295@, volume and @N04260@).
  2. Short form for @A00298@ (@S06072@ in clinical chemistry).
Green Book, 2nd ed., p. 42 [Terms] [Book]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 966 [Terms] [Paper]
See also:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2181 [Terms] [Paper]