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  • Title: Quantitative determination of alkaloids in belladonna tincture USP.
    Author: Gupta VD.
    Journal: Am J Hosp Pharm; 1975 Feb; 32(2):215-6. PubMed ID: 1136969.
    Abstract:
    A simplified method for the quantitative analysis of hyoscyamine hydrobromide or atropine in Belladonna Tincture USP is described. The procedure is based on the formation of an alkaloid-dye complex which can be extracted with an organic solvent and measured spectrophotometrically. The results obtained by this method compare favorably with those obtained by the USP method.
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