UNI EN 482:2021 | Esposizione nei luoghi di lavoro concentrazione agenti chimici

UNI EN 482:2021 | Esposizione nei luoghi di lavoro concentrazione agenti chimici

ID 13346 | 16.04.2021 / Preview allegata

UNI EN 482:2021 Esposizione nei luoghi di lavoro - Procedure per la determinazione della concentrazione degli agenti chimici - Requisiti prestazionali di base

Recepisce: EN 482:2021

Data entrata in vigore: 15 aprile 2021

La norma specifica i requisiti prestazionali per le procedure prescritte per la determinazione della concentrazione degli agenti chimici nei luoghi di lavoro, come richiesto da Chemical Agents Directive 98/24/EC. Questi requisiti si applicano a tutti i livelli delle procedure di misura indipendentemente dallo stato fisico dell'agente chimico (gas, vapore, particelle aeriforme), dalle procedure di misura con campionamento e metodo analitico separato, o da strumenti con lettura diretta.

La norma definisce i requisiti che devono essere soddisfatti dalle procedure di misura, quando vengono applicate in condizioni di laboratorio ben definite, necessari a causa della vastità delle condizioni ambientali che si possono incontrare nella pratica.

Sostituisce: UNI EN 482:2015

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EN 482:2021
Workplace exposure. Procedures for the determination of the concentration of chemical agents. Basic performance requirements

European foreword

This document (EN 482:2021) has been prepared by Technical Committee CEN/TC 137 “Assessment of workplace exposure to chemical and biological agents”, the secretariat of which is held by DIN.

This document corresponds to ISO 20581:2016, published by the International Organization for Standardization (ISO) which contains a modified version of EN 482:2012+A1:2015.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2021, and conflicting national standards shall be withdrawn at the latest by September 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 482:2012+A1:2015.

The major technical changes between this document and the previous edition are as follows:

a) standard title adapted to the wording used in the scope;
b) 4.4, which comprised two subclauses, was revised;
c) recommendation regarding exposure peaks inserted in 5.4.4;
d) 5.4.7 reformulated to improve comprehensibility;
e) new Table 2 with additional requirements for the testing parameters added to 5.10;
f) Annex A specified more in detail;
g) new subclause B.9 for blank subtraction added.

Introduction

National laws and regulations require the assessment of the exposure of a worker to chemical agents in workplace atmospheres. One way of assessing such exposure is to measure the concentration of a chemical agent in the air in the worker's breathing zone. The procedures used for such measurements should provide reliable and valid results for the comparison purpose of exposure measurements with occupational exposure limit values (OELVs) and for the provision of acceptable control strategies.

This document introduces basic requirements to fulfil the measurement procedures in the process of quantitative exposure assessment. Specific European Standards and International Standards have been prepared for different types of measuring procedures and measuring devices. These include standards for airborne particle samplers (EN 13205, all parts), diffusive samplers (EN 838 and ISO 16107), pumped samplers (EN ISO 22065), short-term detector tubes (EN ISO 17621), personal sampling pumps (EN ISO 13137), metals and metalloids in airborne particles (EN ISO 21832), mixtures of airborne particles and vapour (EN 13936) and direct-reading instruments for toxic gases and vapours (EN 45544, all parts). In these specific documents, additional requirements have been included for the procedure or device in question, so that the basic requirements of this document are not compromised. Where no specific European Standard and/or International Standard exist, only the basic requirements apply.

Performance requirements given in this document are intended to apply under environmental conditions present at the workplace. However, because a wide range of environmental conditions are encountered in practice, this document specifies requirements that have to be fulfilled by measuring procedures when tested under prescribed laboratory conditions.

It is the user's responsibility to choose the appropriate procedures or devices that meet the requirements of this document. One way of doing this is to obtain information or confirmation from the provider of a procedure or the manufacturer of a device. Type-testing or, more generally, assessment of the performance of procedures or devices, can be undertaken by the manufacturer, user, testing house or research and development laboratory, as is most appropriate. A number of existing procedures for workplace measurements have either been tested over a part of the required minimum measuring range, but not over the entire range, or have not been tested for all environmental influences and potential interferences. If these partially validated procedures meet the performance requirements of this document, they can be used at present. Nevertheless, these procedures should be tested over the full ranges as soon as is reasonably practicable.

Scope

This document specifies basic performance requirements for procedures for the determination of the concentration of chemical agents in workplace atmospheres as required by the Chemical Agents Directive 98/24/EC [13]. These requirements apply to all steps of measuring procedures regardless of the physical form of the chemical agent (gas, vapour, airborne particles), measuring procedures with separate sampling and analytical methods, and direct-reading instruments.

This document specifies requirements that are fulfilled by measuring procedures when tested under prescribed laboratory conditions due to a wide range of environmental conditions encountered in practice.

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