ANNEX II SAMPLE PREPARATION AND REQUIREMENTS FOR METHODS OF ANALYSIS USED IN OFFICIAL CONTROL OF THE LEVELS OF DIOXINS (PCDD/PCDF) AND THE DETERMINATION OF DIOXIN-LIKE PCBs IN CERTAIN FEEDINGSTUFFS

3. Quality assurance requirements to be complied with for sample preparation
The general provisions on the preparation of samples for analysis as laid down in the Annex to Commission Directive 81/680/EEC of 30 July 1981 amending Directives 71/250/EEC, 71/393/EEC, 72/199/EEC, 73/46/EEC, 74/203/EEC, 75/84/EEC, 76/372/EEC and 78/633/EEC establishing Community methods of analysis for the official control of feedingstuffs are applicable.
In addition the following requirements have to be complied with:
the samples must be stored and transported in glass, aluminium, polypropylene or polyethylene containers. Traces of paper dust must be removed from the sample container. Glassware should be rinsed with solvents previously controlled for the presence of dioxins,
perform a blank analysis by carrying out the entire analytical procedure omitting only the sample,
sample weight used for the extraction must be sufficient to fulfil the requirements with respect to sensitivity.
OJ L 246, 29.8.1981, p. 32.