# Commission Regulation (EC) No 333/2007 of 28 March 2007 laying down the methods of sampling and analysis for the control of the levels of trace elements and processing contaminants in foodstuffs (Text with EEA relevance), Division C.2.2.1: Specific procedures for lead, cadmium, mercury, inorganic tin and inorganic arsenic

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

The analyst shall ensure that samples do not become contaminated during sample preparation. Wherever possible, apparatus and equipment coming into contact with the sample shall not contain those metals to be determined and be made of inert materials, e.g. plastics such as polypropylene, polytetrafluoroethylene (PTFE) etc. These should be acid cleaned to minimise the risk of contamination. High quality stainless steel may be used for cutting edges.
There are many satisfactory specific sample preparation procedures which may be used for the products under consideration. For those aspects not specifically covered by this Regulation, the CEN Standard ‘Foodstuffs. Determination of elements and their chemical species. General considerations and specific requirements’ has been found to be satisfactory but other sample preparation methods may be equally valid.
In the case of inorganic tin, care shall be taken to ensure that all the material is taken into solution as losses are known to occur readily, particularly because of hydrolysis to insoluble hydrated Sn(IV) oxide species.

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Source: https://www.legislation.gov.uk/eur/2007/333/annex/part/C/division/C.2/division/C.2.2/division/C.2.2.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2007-333/annex/part-C/division-C.2/division-C.2.2/division-C.2.2.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.