EN 13040:2007 – Soil improvers and growing media – Sample preparation for chemical and physical tests, determination of dry matter content, moisture content and laboratory compacted bulk density

5 Sampling
The laboratory sample shall be obtained in accordance with EN 12579.
6 Sample reception
Upon receipt of the laboratory sample, the laboratory shall confirm that the sample relates to the accompanying documentation. The sampler shall submit with the sample, at least the following minimum requirements:
a) name of the client;
b) to whom the results shall be reported if different from a) above;
c) place and date the sample was taken;
d) name of the sampler;
e) discrete sample identification; and
f) analysis required.
The laboratory shall confirm that a sufficient sample has been provided for the analyses to be undertaken by recording the date the sample was received and giving the sample a unique laboratory identification code. This code shall be recorded on all subsequent sub sample containers and on the documentation supplied with the sample. Analysis shall be undertaken within 2 weeks of receipt of the sample.
7 Transportation and storage of samples
The laboratory sample shall be transported and stored without compaction or any other treatment which may irreversibly alter its moisture content, particle size, packing characteristics or any feature which affects density. A sub-sample or sample of not less than 5 l, as submitted to the laboratory shall be stored so that it shall not undergo any further decomposition, physical damage, hydration or dehydration. Recommended storage should be in a closed polyethylene bag so that the sample fills the container with no free air at 1 °C to 5 °C, but not frozen. The storage period depends on several factors including what is the normal custom in the analysing laboratory or country.
It is recommended that all such samples should be stored for a minimum of 28 days from the date of reporting the results to the client. The expected storage period shall be reported to the client at the time the results are reported.
8 Preparation of the un-dried test sample
8.1 Sample preparation Thoroughly mix the laboratory sample, gently breaking any lump or agglomerate of the sample that has been caused, by, for example, compression during transportation.
NOTE Care should be taken to avoid breaking intrinsic parts and to avoid a loss of moisture.
EN 13040:2007 – Soil improvers and growing media – Sample preparation for chemical and physical tests, determination of dry matter content, moisture content and laboratory compacted bulk density