Ratio of density to a reference density, usually the density of water at \(4\ ^{\,\unicode{x26ac}}\text{C}\); in the older literature this is called @S05799@.
Sources: Green Book, 2
nd ed., p. 12 [
Terms] [
Book]
PAC, 1990,
62, 2167. (
Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2210 [
Terms] [
Paper]
See also: PAC, 1996,
68, 957. (
Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 990 [
Terms] [
Paper]