SAMPLE	OXALIC ACID
NET ACTIVITY; NORMALIZED FOR COUNTING VOLUME, MASS CHANGE, DILUTION, IMPURITIES, ETC. ACTIVITY IN COUNTS PER MINUTE	AS	AOx
NORMALIZATION FOR ISOTOPE FRACTIONATION. ALL δ13 VALUES WITH REGARD TO PDB
ABSOLUTE INTERNATIONAL STANDARD ACTIVITY (OXALIC ACID ACTIVITY) CORRECTED FOR DECAY SINCE 1950
x=YEAR OF GROWTH y=YEAR OF MEASUREMENT	λ in table always (8267·yr)-1

	GEOCHRONOLOGICAL SAMPLES	GEOCHEMICAL SAMPLES WITHOUT AGE CORRECTION	GEOCHEMICAL SAMPLES WITH AGE CORRECTION
PER MIL DEPLETION OR ENRICHMENT WITH REGARD TO STANDARD
Equivalent Equation
PER MIL DEPLETION OR ENRICHMENT RELATIVE TO STANDARD NORMALIZED FOR ISOTOPE FRACTIONATION
Equivalent Equation
APPROXIMATE RELATIONSHIP
Conventional radiocarbon age BP, based on 5568 yr. half life λ=(8033·yr)-1
ALWAYS REPORT	δ13C and conventional radiocarbon age	Δ14C, δ14C, and δ13C	Δ, δ14C, and δ13C
OPTIONAL	d14C and D14C	*

When year of collection z differs from year of measurement y, either A_S or A_SN should be replaced by respectively A_Se^λ(y-z),A_SNe^λ(y-z) or A_S and A_SN kept unchanged but oxalic acid corrected for decay between year of collection and 1950 only. This procedure is applicable only when marked in the table by an asterisk.