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sklademVydáno: 1986
ISO 6636-1:1986
ISO 6636-1:1986-Fruits, vegetables and derived products — Determination of zinc content — Part 1: Polarographic method
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| Označení normy: | ISO 6636-1:1986 |
| Počet stran: | 3 |
| Vydání: | 1 |
| Vydáno: | 1986 |
DESCRIPTION
ISO 6636-1:1986
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.