A potentiometric nonaqueous assay for barbiturates and their preparations

Swartz, Charles J.; Foss, Noel E.

doi:10.1002/jps.3030440410

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Chemotherareutics "1

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1956

1972

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Cited by 10 publications

(3 citation statements)

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“…Diphenan (4-benzylphenyl carbamate) and urethane can be determined by heating with O.LV perchloric acid for 0.5 and 1 hour, respectively, and back-titrating with triethylamine. Barbiturates in pharmaceutical preparations dissolved in chloroform and poly (ethylene glycol) 400 can be rapidly and accurately titrated with sodium methoxide (148).…”

Section: Specific Applicationsmentioning

confidence: 99%

Acid-Base Titrations in Nonaqueous Solvents

Riddick¹

1956

Anal. Chem.

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Section: Specific Applicationsmentioning

confidence: 99%

Acid-Base Titrations in Nonaqueous Solvents

Riddick¹

1956

Anal. Chem.

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“…Barbituric acid derivatives produce an intense red-violet color with copper-pvridine reagent (256). Barbiturates can be titrated in a chloroform-polyethylene glycol 400 solvent system using sodium methoxide in methanol as titrant (488). Color reactions of thiobarbituric acid derivatives were reported (209) as W'ell as quantitative methods (549) for their determination.…”

Section: Chemotherareutics "mentioning

confidence: 99%

Pharmaceuticals and Related Drugs

Haycock¹,

Mader²

1957

Anal. Chem.

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“…Swartz and Foss (3) titrated barbiturates, as free acids, in a polyethylene glycol 400 and chloroform mixture. Titration was effected potentiometrically with sodium methoxide.…”

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confidence: 99%