ISO 2190-2016 pdf free.Granulated cork – Determination of moisture content.
This document specifies the reference method for determination of the moisture content of granulated cork.
NOTE For the purposes of factory control, the manufacturer can choose another test method and/or different equipment. in this case, It is important to establish the co-relation between that method (current method) and the reference method.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2067, Granulated cork — Sampling
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 633 and the following apply.
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3.1 moisture content
loss of mass of a test specimen after drying under specific conditions, compared to the initial mass of the test specimen
4 Principle
Weighing, drying and reweighing of a test specimen; the loss of mass calculated is the moisture content.
5 Apparatus
Ordinary laboratory equipment and, in particular, the following.
5.1 Balance, with a resolution of 0,01 g.
5.2 Oven, ventilated, and maintained at (103 ± 2) °C.
5.3 Open containers (dry), of such dimensions that allow the test specimen to be about 50 mm high.
To dry the containers, put them in the oven at 103 °C for 30 mm. Then put the containers in the desiccator for 30 mm.
5.4 Desiccators, of adequate capacity to hold the containers, and containing an efficient desiccant (e.g. silica gel).
6 Sampling
Carry out the sampling in accordance with the procedure specified in Iso 2067.
7 Procedure
7.1 Test sample
From the laboratory sample (see 150 2067), take at random three test specimens of about 50 g each.
7.2 Determination
Determine the mass of each container (5.3) to the nearest 0,1 g (ml).
Place each test specimen in a container, distributing it in such a way that its surface is horizontal and the test specimen is about 50 mm high.
Determine the mass of each set (m2), to the nearest 0,1 g. Put the sets in the oven (&Z) set at 103 °C, for at least 1 h. Then place them in the desiccator and let them cool for at least 30 mm. Then determine the mass of each set.
Repeat the procedure described above until constant mass (i.e. until two consecutive weighings of each set do not differ by more than 0,5 g) (m3).
To accelerate the test, it is advisable that the first drying be for at least 3 h.ISO 2190 pdf download.