A spectrophotometric method is described for the determination of quebracho in mixtures with other tannin extracts and related materials. The accuracy of the method is to within a range of ±10 per cent. A method is also described for the identification of quebracho.
K. Field and B. E. Kent, Analyst, 1968, 93, 259 DOI: 10.1039/AN9689300259
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