https://doi.org/10.1351/goldbook.G02629
@E02141-1@ minus the product of @T06321@ and @E02149@. It was formerly called @F02515@ or free @E02141-2@.
Sources:
Green Book, 2nd ed., p. 48 [Terms] [Book]
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2192 [Terms] [Paper]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 975 [Terms] [Paper]