o-phthalic acid as a standard substance
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J.A. Kennedy; H.K.J. Powell; M.C. Taylor
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Article
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1983
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Elsevier Science
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English
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o-Phthalic acid is proposed as a standard substance for buffer solutions of known hydrogen ion concentration (I < 0.2 M KCl, p[H+] = 3.0-5.4, 25ยฐC). Its crystallinity, purity and slightly wider buffer range afford advantages over acetic acid. Empirical relationships between measured pH (pH,) and cal