The determination of tin in canned foods with quercetin

Abstract

A colorimetric method is described for determining tin in canned foods by means of the orange-coloured complex it forms with quercetin. Interference from iron(III) is masked by thiourea. The method gives results comparable with those obtained by the dithiol method but manipulation is easier, and it is, therefore, more suitable for routine analytical determinations, particularly when the tin content is relatively high.