The Mitchell reaction (ferrous sulphate) has been applied to the determination of catecholic phenolic acids and pyrogallol in urine. A technique has been described for the determination of pyrogallol in the presence of catecholic phenolic acids. The separation of catecholic phenolic acids by paper chromatography has been examined. A study has been made of the excretion of these substances in urine.
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S. L. Tompsett (1958) studied this question.
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