THE SAMPLING
sampling and transfer : the ultimate hazard zone
We provide you with a guide so that the analysis has every chance to be representative and valuable:
- Sample collection is the most critical phase of an analysis, it generates most of the uncertainty of the result:
- Collecting the right quantity, characteristic of the lot, of the parcel.
- Collecting at the right spot (e.g. apple tree periphery versus inside, field edges versus center...).
- The transfer of samples to the laboratory, as well as the first preparations that will be performed there, are also critical operations because they can :
- destroy the residue by exposure to unsuitable conditions (T°C...) ;
- pollute the sample with an unsuitable container (by transfer) ;
- absorb the residue in a container
- discriminate a part of the sample and thus a part of the analyzed residue.
- This part of the study adds regulatory constraints related to the number of unit and the weight to insure a valid analysis.
How much weight, how many units ?
WHich container, which PROCEDURES ?
FRuits & vegetables
Samples are packaged :
- with a unique reference, assigned to each sample, in a contactless packaging,
- with double protection,
- no plastics if looking for PAHs
- fresh or frozen
Liquids (water, wine, juice)
Samples are packaged :
- with a unique reference, assigned to each sample, in a contactless packaging,
- with double protection, with PTFE seal
- Avoiding plastics if multi-residue search,
- avoiding glass if looking for glyphosate,
- if sample is frozen, remember not to fill the glass bottles completely.
cereals
Samples are packaged :
- with a unique reference, assigned to each sample, in a contactless packaging,
- with double protection,
- no plastics if looking for PAHs
- fresh or frozen
apiary products
Samples are packaged :
- with a unique reference, assigned to each sample, in a contactless packaging,
- with double protection (glass, plastic or kraft paper),
- no plastics if looking for PAHs
vegetable & essential oils
Samples are packaged :
- with a unique reference, assigned to each sample, in a contactless packaging,
- with double protection (glass, plastic or kraft paper), with PTFE seal
- no plastics if looking for PAHs
soils - air
Samples are packaged :
- with a unique reference, assigned to each sample, in a contactless packaging,
- with double protection (glass, plastic or kraft paper),
- no plastics if looking for PAHs
aromatic herbs & spices
Samples are packaged :
- with a unique reference, assigned to each sample, in a contactless packaging,
- with double protection (glass or plastic)
- no plastics if looking for PAHs
- fresh or frozen
seeds
Samples are packaged :
- with a unique reference, assigned to each sample, in a contactless packaging,
- with double protection (glass or plastic)
- no plastics if looking for PAHs
animal products
Samples are packaged :
- with a unique reference, assigned to each sample, in a contactless packaging,
- with double protection (glass or plastic)
- no plastics if looking for PAHs
Once collected and packaged, it is necessary to send the sample ...
WITHIN 24H -WITHOUT DEFROSTING - WITH THE DATE OF COLLECTION