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. 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 4.

Acidimetric Assay of NIST PS1 Benzoic Acid Result Summary

benzoic acid mass fraction, g/g 0.999923
combined standard uncertainty, uc, g/g 0.00002
coverage factor, k 1.97
expanded uncertainty, U, g/g 0.00004