Colorimetric Determination of Inorganic Sulfate in Small Amounts of Urine

Kahn, Bernard S.; Leiboff, S.L.

doi:10.1016/s0021-9258(18)83883-2

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1930

1957

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Cited by 18 publications

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“…A crude separation of malic acid from other materials is effected by ion exchange resins, and malic acid is determined colorimetrically in an eluate after reaction with sulfuric acid and 2,7-naphthalenediol. Malic acid, as well as other acids, can be determined by fractionation of ion exchange resins in the acid form (5,15,20) or by partition chromatography on silica gel columns (4,8,13,14) and subsequent analysis of the fractions. These methods have the advantage of simultaneous analyses for a number of acids, but some require considerable time for each determination, and others lack the desired accuracy and precision.…”

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confidence: 99%