Nekovové materiály

Oblast zaměření: Papír a lepenka
Komise : CEN/TC 172 (Pulps, paper and board)
Původce: CEN
K připomínkám do: 14.12.2020
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This document describes procedures for the testing of migration of fluorescent whitening agents from paper and board intended to come into contact with foodstuffs. The method is based on liquid chromatography with fluorescence detection for quantification. The document is applicable to four different types of fluorescent whitening agents, diaminostilbene hexasulfonate, diaminostilbene tetrasulfonate, diaminostilbene disulfonate and distyrylbiphenyl.

Oblast zaměření: Plasty
Komise : CEN/TC 249 (Plastics)
Původce: CEN
K připomínkám do: 28.12.2020
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This document specifies terms and definitions in the field of plastics related to any environmental aspects and provides a common vocabulary basis for:

—    biodegradability;

—    bio-based plastics;

—    carbon and environmental footprint;

—    plastics in natural environments;

—    recycling, e.g. mechanical and chemical recycling ;

—    design ;

—    waste management;

—    circular economy.

This document aims to provide a comprehensive glossary which uses the applicable definitions providing when appropriate additional notes to make these definitions understandable without reference to other documents. Definitions are as far as possible adopted from existing standards but when the intention or definition is unclear additional context or definitions are updated or added.

Oblast zaměření: Plynná paliva a hořlavé plyny
Komise : CEN/TC 238 (Test gases, test pressures and categories of appliances)
Původce: CEN
K připomínkám do: 5.01.2021
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This part of ISO 10101 specifies general requirements for the determination of water in natural gas using the Karl Fischer method (see [1]).

ISO 10101-2 and ISO 10101-3 specify two individual methods of determination, a titration procedure and a coulometric procedure, respectively.

Oblast zaměření: Plynná paliva a hořlavé plyny
Komise : CEN/TC 238 (Test gases, test pressures and categories of appliances)
Původce: CEN
K připomínkám do: 5.01.2021
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This document specifies a volumetric procedure for the determination of water content in natural gas. Volumes are expressed in cubic metres at a temperature of 273,15 K (0 °C) and a pressure of 101,325 kPa (1 atm). It applies to water concentrations between 5 mg/m3 and 5 000 mg/m3.

Oblast zaměření: Plynná paliva a hořlavé plyny
Komise : CEN/TC 238 (Test gases, test pressures and categories of appliances)
Původce: CEN
K připomínkám do: 5.01.2021
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This part of ISO 10101 specifies a coulometric procedure for the determination of water content by the Karl Fischer method. The method applies to natural gas and other gases which do not react with Karl Fischer (KF) reagents.

It applies to water concentrations between 5 mg/m3 and 5 000 mg/m3. Volumes are expressed at temperature of 273,15 K (0°C) and a pressure of 101,325 kPa (1 atm).

WARNING — Local safety regulations are to be taken into account, when the equipment is located in hazardous areas.