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- W2079147294 abstract "A nonaqueous titrimetric procedure was developed for the determination of the dimethyl sulphate, methyl hydrogen sulphate and sulphuric acid content of dimethyl sulphate samples. Methyl hydrogen sulphate and sulphuric acid are determined by a differentiating potentiometric titration in pyridine with tributylethylammonium hydroxide. Pyridine converts the dimethyl sulphate into the weakly acidic methylpyridinium methyl sulphate which does not interfere in the titration. Dimethyl sulphate is determined by reacting it with an excess of 2-dimethylaminoethanol and titrating the excess with perchloric acid. Precision and recovery data for commercial samples of dimethyl sulphate are presented. Ein nichtwäßriges Titrationsverfahren wurde zur Bestimmung des Gehaltes von Dimethylsulfatproben an Dimethylsulfat, Methylhydrogensulfat und Schwefelsäure entwickelt. Methylhydrogensulfat und Schwefelsäure wurden durch differenzierende potentiometrische Titration mit Tributyläthylammoniumhydroxyd bestimmt. Pyridin wandelt das Dimethylsulfat in schwach saures Methylpyridiniummethylsulfat um, das bei der Titration nicht stört. Dimethylsulfat wird bestimmt durch Reaktion mit überschüssigem 2-Dimethylaminoäthanol und Titration des Überschusses mit Überchlorsäure. Genauigkeit und Ausbeutedaten für Handelsproben von Dimethylsulfat werden vorgelegt. On a élaboré une technique de titrimétrie en milieu non aqueux pour déterminer les teneurs en sulfate diméthylique, sulfate acide de méthyle et acide sulfurique d'échantillons de sulfate diméthylique. On dose le sulfate acide de méthyle et l'acide sulfurique par un titrage potentiométrique différentiel en pyridine au moyen d'hydroxyde de tributyléthylammonium. La pyridine transforme le sulfate diméthylsulfate de méthylpyridinium faiblement acide qui n'interfère pas dans le dosage. On dose le sulfate diméthylique par réaction avec un excès de 2-diméthylaminoéthanol et titrage de l'excès à l'acide perchlorique. On présente les données concernant la précision et le rendement pour des échantillons commerciaux de sulfate diméthylique." @default.
- W2079147294 created "2016-06-24" @default.
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- W2079147294 date "1966-07-01" @default.
- W2079147294 modified "2023-10-02" @default.
- W2079147294 title "Acid-base titrations in nonaqueous solventsAnalysis of dimethyl sulphate" @default.
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- W2079147294 doi "https://doi.org/10.1016/0039-9140(66)80196-0" @default.
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