ISO 6636-1:1986
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Fruits, vegetables and derived products — Determination of zinc content — Part 1: Polarographic method
| Published By | Publication Date | Number of Pages |
| ISO | 1986-04 | 8 |
The method consists in ashing of a test portion in a muffle furnace at 525+25 C, treating the ash obtained with hydrochloric acid, neutralizing with ammonia solution and determing of the value using an ammonia/ammonium chloride electrolyte. Copper, tin, lead and cadmium do not interfere.
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