A proposed non‐ashing technique employing ion‐exchange resins for the determination of lead in wine | Zendy

Edge R. A. | Zendy; Penny N. | Zendy

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A proposed non‐ashing technique employing ion‐exchange resins for the determination of lead in wine

Author(s) -

Edge R. A.,

Penny N.

Publication year - 1958

Publication title -

journal of the science of food and agriculture

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.782

H-Index - 142

eISSN - 1097-0010

pISSN - 0022-5142

DOI - 10.1002/jsfa.2740090704

Subject(s) - dithizone , ashing , wine , elution , chemistry , lead (geology) , detection limit , ion exchange , chromatography , ion exchange resin , iodine , ion , inorganic chemistry , physics , food science , organic chemistry , quantum mechanics , geomorphology , geology

The method proposed is to pass the wine (free from solid particles) down a Dowex‐50 column and elute with 4N‐HCl. The lead is determined in the eluate with dithizone. Recovery of added lead (2 p.p.m.) is 81–101% and results agree well with those by the iodine pentoxide method, 2 although they are rather less consistent. Determinations require only 3 instead of 10 hours. The procedure is recommended for control purposes to establish if a sample contains less than the statutory limit of 1 p.p.m. of lead.

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