BS ISO 19670:2017 pdf download – Fertilizers and soil conditioners — Solid urea aldehyde slow release fertilizer — General requirements
5.6 Determination of the mass fraction of nitrogen from IBDU and CDU
It shall be determined in accordance with ISO 25705:2016, method A or ISO 19746.
6 Sampling and preparation of test sample
6.1 Sampling method
6.1.1 Products in bags
Carry out the sampling operation by following the procedure described in ISO 8633.
6.1.2 Products in bulk
Carry out the sampling operation by following the procedure described in ISO 8633.
6.2 Reduction of samples
Mix all the increments (collected as in 6.1) uniformly and promptly to form a single aggregate sample using a device or by hand. The aggregate sample is reduced to about 1 kg according to the procedure in ISO 7742. Next, divide into two parts for final laboratory samples. The two laboratory samples are put into two clean and dry glass or plastic containers or any other inert material of adequate resistance capable of maintaining the sample in its original condition. The containers shall be fitted with airtight closures. Carry out all the operations described above as rapidly as possible to avoid loss or gain of moisture. Each container shall be secured and sealed following the instruction given in ISO 7410. Each laboratory sample shall be labelled following the instructions given in ISO 7410. The label shall, at minimum, carry the following information:
a) the name of manufacturer;
b) the name of product;
c) the manufacturer’s reference and batch number or production date (if available);
d) the lot size;
e) the date of sampling;
f) the place of sampling;
g) the signature of the sampler;
h) the signature and name of the person or his representative on whose premises the sample was taken.
One of the containers is used for further quality analysis, while the other is kept for additional analysis in 6 mos.
6.3 Test sample preparation
Select one of the laboratory samples from the two containers obtained in 6.2. Mix the content of the container according to the procedure in ISO 7742. The test sample used for determining the items specified in Tables 1 and 2 should be reduced to 100 g. Grind this test sample in the grinder without warming the sample, pass the portion of the sample that passed a 0,500 mm sieve through a 0,212 mm sieve; use only the portion of the sample that does not pass the 0,212 mm sieve. The test samples are put into clean and dry bottles to be used for further analysis.
7 Marking and labelling
The marking and labelling should follow the legislation. Further information can be provided if appropriate and when the legislation allows. Any chemical classifications on the label should conform to the United Nations’ “Globally Harmonized System of Classification and Labelling of Chemicals” (GHS) and applicable national or regional adoption thereof. Anything concerning the labels should refer to the latest version of ISO standards and local/regional legislations.
7.1 The following information should appear on the face of the containers:
a) the total nitrogen content;
b) the ureic nitrogen content (where this is at least 1 % by weight);
c) the nitrogen from IBDU/CDU;
d) the nitrogen that is soluble in cold water (CWSN) for urea formaldehyde/methylene urea fertilizer;
e) the nitrogen that is soluble only in hot water (HWSN only) and/or AI for urea formaldehyde/methylene urea fertilizer;
f) the date of production;
g) the net mass;
h) the address and name of the manufacturer.
7.2 A product’s use instructions should be printed on the back of containers. The information should include the name of product, nutrient content, method of usage, storage and usage precautions.
7.3 The single mass value of each container shall be declared (e.g. 50 kg).
7.4 All other information required by ISO 7409 should also appear on the face of the containers.
8 Packaging, transport and storage
The applicable national or regional safety guidelines for handling and storage should be followed.
8.1 During transportation, the packaged products should be handled with care to avoid moisture,sunlight and damage of fertilizer and fertilizer packages.
8.2 The products should be stored in a dry, cool place (ambient temperature) away from sunlight and moisture.BS ISO 19670 pdf download.