| Avoid sample contamination (by paper fibres, hair, animal har, mould infestation and more). |
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| Handle small samples with tweezers or forceps, or through a clean plastic bag. This will prevent contamination. |
| After sampling, dry and store the samples in a dry, dark place. Freeze wet samples. |
| Wrap dry samples in aluminum foil or put them in a plastic bag (not a paper bag!). Put small samples in glass or plastic vials. |
| Provide each sample with a unique label on the outer surface of the bag/vial. Label all samples in the series. |
