Give the procedure and reaction equations for the quantitative determination of papaverine hydrochloride (C20H21NO4.HCl) (Mr 375.86) by gravimetry in the form of a base. Calculate the coefficient (factor) for converting papaverine base to papaverine hydrochloride and the content of papaverine hydrochloride in the analyzed sample, if, when using a sample weighing 0.5243 g, the mass of the gravimetric form, brought to a constant value, is 0.4735 g. Mr of hydrogen chloride 36.46

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