. Author manuscript; available in PMC: 2022 Aug 17.

Published in final edited form as: Anal Chem. 2018 Aug 16;90(17):10510–10517. doi: 10.1021/acs.analchem.8b02575

Table 6.

Certified Values of NIST PS1

mass fraction^a, g/g	specific amount^a, mol/kg
benzoic acid 0.99992 − 0.00006 + 0.00004	8.1880 − 0.0005 + 0.0004

Expressed as $x - U_{L_{95 %}} - U_{H_{95 %}}$ , where x denotes the certified value, and $U_{L_{95 %}}$ and $U_{H_{95 %}}$ indicate the low and high boundaries of a 95% coverage interval.