BS ISO 4874:2020 pdf download.Tobacco — Sampling of batches of raw material — General principles.
4 Contractual arrangements
The contract between the interested parties shall state:
a) at what stages of production and delivery sampling shall be carried out;
b) the party or parties responsible for carrying out the sampling and under whose control;
c) the characteristics to be determined;
d) the laboratory or laboratories that will perform the analyses;
e) the maximum interval of time admissible between sampling and analysis. (This interval should be as short as possible.)
6.2 Treatment of damaged sampling units
The treatment of damaged sampling units depends on the aim of the analyses.
a) If the damage to the tobacco is irrelevant with respect to the characteristics to be determined (for example, disease markings when assessing the length of the leaf), sample damaged units in the same way as undamaged units.
b) If the assessment may be affected by the damage, the damaged sampling units shall be sampled separately and a record made.
c) If the damage to the tobacco is such that the tobacco is unusable for the assessment of the
characteristics to be determined, do not sample that sampling unit.
It can be necessary to grade the damage to the tobacco in the damaged sampling units into several classes and obtain sufficient increments from the damaged sampling units.
6.4.3 Size of single samples
Each single sample is composed of all increments taken from the same unit.
The size and composition of the samples shall be appropriate to
a) the type of tobacco,
b) the size of the sampling unit, and
c) the type and number of determinations to be carried out.
NOTE Examples of typical sample sizes are given in Annex A.
7 Sampling report
The sampling report shall contain the following information:
a) the type and origin of the tobacco;
b) the consignment number as well as any batch number or numbers;
c) the total mass of the batch;
d) the method of packing;
e) the number of packages and their unit mass, and whether the mass is net or gross;
f) the number of damaged packages and their unit mass, and whether the mass is net or gross;
g) the appearance of the tobacco;
h) the purpose of the sampling and the characteristics to be determined;
i) the number of units sampled;
j) the number, nature and original position of the increments;
k) the description of the single samples (kind, consistency, unit mass);
l) the number of single samples;
m) if applicable, the composition of the gross sample and its mass;
n) if applicable, the method of reducing the gross sample as well as the composition of the reduced sample and its mass;
o) the composition and the mass of the laboratory sample(s) and the method by which they have been obtained and conserved;
p) the names and signatures of the party/parties who carried out the sampling;
q) date of sampling.BS ISO 4874 pdf download.