ISO 6636-1:1986

Current Revision
Fruits, vegetables and derived products -- Determination of zinc content -- Part 1: Polarographic method

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ISO 6636-1:1986

Fruits, vegetables and derived products -- Determination of zinc content -- Part 1: Polarographic method

PUBLISH DATE 1986
ISO 6636-1:1986

The method consists in ashing of a test portion in a muffle furnace at 525±25 °C.

It involves treating the ash obtained with hydrochloric acid, neutralizing with ammonia solution, and determining the value using an ammonia/ammonium chloride electrolyte.

Copper, tin, lead and cadmium do not interfere.

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