# Commission Regulation (EEC) No 1764/86 of 27 May 1986 laying down minimum quality requirements for products processed from tomatoes under the production aid scheme, Division 1: Procedure

Extent: E+W+S+N.I.

Weigh out 10 g tomato powder or flakes to within 0,01 g into a 300-ml beaker. Add 200 ml water. Mix well. Leave to settle for 10 minutes. Carefully pour off supernatant. Repeat the operation a second time. Collect solid residue on an ashless ultra-fast filter. Roast in a porcelain incineration dish. If necessary, mix with a little distilled water and return to furnace until the ash is white.
Mix with 10 cm3 nitric acid (d = 1,4) diluted to half. Heat very gently and collect precipitate on an ashless pleated filter, dry and roast in a tared crucible (m°). If necessary mix as before with a little distilled water and roast once more if ash is not white. Weigh crucible (m).

---
Source: https://www.legislation.gov.uk/eur/1986/1764/annex/division/10/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-1986-1764/annex/division-10/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.