Chemie a potravinářství

Komise : CEN/TC 139 (Paints and varnishes)
Původce: CEN
K připomínkám do: 3.04.2019
Zobraz více Zobraz méně
 

This document specifies a method for determining the non-volatile matter by volume (NVV) of coating materials and related products by measuring the density of a dried coating for any specified temperature range and period of drying or curing. This method determines the non-volatile matter immediately after application.

Using the non-volatile matter by volume results obtained in accordance with this part of ISO 3233, it is possible to calculate the spreading rate of coating materials.

The method specified in this document is the preferred method for air-drying materials. Its use for other materials still has to be tested.

Annex B gives an overview of the existing methods for determination of non-volatile-matter content and volume of non-volatile matter.

This document is not applicable to coating materials in which the critical pigment volume concentration is exceeded.

Komise : CEN/TC 139 (Paints and varnishes)
Původce: CEN
K připomínkám do: 3.04.2019
Zobraz více Zobraz méně
 

This document specifies the requirements and the corresponding test methods for five types of linseed stand oil suitable for paints and varnishes.

Oblast zaměření: Potravinářské produkty
Komise : CEN/TC 327 (Animal feeding stuffs: Methods of sampling and analysis)
Původce: CEN
K připomínkám do: 9.04.2019
Zobraz více Zobraz méně
 

This document specifies a liquid chromatographic method with triple-quadrupole mass spectrometry (MS/MS) detection for the determination of pentachlorophenol (PCP) in feed materials and animal feed.

The limit of quantitation (LOQ) for the PCP determination in guar gum, fatty acid distillates (FAD) and animal feed is 10 µg/kg. Individual laboratories are responsible for ensuring that the equipment that they use will achieve this limit of quantification.

The method is validated in an international collaborative trial for pentachlorophenol in compound feed, guar gum and fatty acid distillate in the range between 9 µg/kg and 22 µg/kg.

The results of the collaborative trial, in which 16 laboratories participated, have shown that the method is applicable for the determination of PCP in compound feed, guar gum and FAD at the desired limit of 10 µg/kg. Satisfactory results were obtained for one compound feed sample, guar gum and the two FAD samples (HorRat <2), while for the second compound feed sample a HorRat value of 2,2 was obtained.

Oblast zaměření: Hnojiva
Komise : CEN/TC 260 (Fertilizers and liming materials)
Původce: CEN
K připomínkám do: 9.04.2019
Zobraz více Zobraz méně
 

This document specifies a method for the determination of the speed and effectiveness of the neutralizing potential of calcium carbonate, calcium magnesium carbonate and calcium magnesium silicate liming materials by potentiometric titration with hydrochloric acid.

For liming materials coarser than 1 mm, it is essential to prepare the sample of a liming material by following exactly the description of Annex A.

This method is applicable only to liming materials with a maximum particle size of 6,3 mm.

The type of liming material can be identified according to EN 14069 and the particle size can be determined according to EN 12948.