normalized and standardized value for the amount of the ¹⁴C isotope in a sample, calculated relative to the standardized and normalized ¹⁴C isotope amount of oxalic acid standard reference material, SRM 4990c¹ SRM 4990c is an example of a suitable product supplied by the US National Institute of Standards and Technology. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products may be used if they can be shown to lead to the same results.¹

SRM 4990c is an example of a suitable product supplied by the US National Institute of Standards and Technology. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products may be used if they can be shown to lead to the same results.

normalized and standardized value for the amount of the ¹⁴C isotope in a sample, calculated relative to the standardized and normalized ¹⁴C isotope amount of oxalic acid standard reference material, NIST SRM 4990b or NIST SRM 4990c or Sucrose (NIST SRM 8542)¹ NIST SRM 4990b or NIST SRM 4990c or Sucrose (NIST SRM 8542) is the trade name of a product supplied by the US National Institute of Standards and Technology. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products can be used if they can be shown to lead to the same results.¹

NIST SRM 4990b or NIST SRM 4990c or Sucrose (NIST SRM 8542) is the trade name of a product supplied by the US National Institute of Standards and Technology. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products can be used if they can be shown to lead to the same results.

carbon derived from biomass (3.8.25)

tradable certificate or permit that represents the right to emit a specified amount of greenhouse gases (3.6.15)

sum of annual greenhouse gas emissions (3.6.16) and removals, expressed as CO₂ equivalents, associated with the use stage of a construction works

mechanism for compensating for all or for a part of the carbon footprint of a product (3.11.1) or the partial carbon footprint of a product (3.11.2) through the prevention of the release (3.5.19) of, reduction in, or removal of an amount of greenhouse gas emissions (3.9.8) in a process (3.1.9) outside the product system (3.5.1) under study

environmental tax on emissions of carbon dioxide or other greenhouse gases (3.6.15)

carbon derived from biomass (3.5.9)

carbon derived from biomass

biogeochemical cycle by which carbon is exchanged amongst the biosphere, pedosphere, hydrosphere, and atmosphere of the earth