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The risk of explosive atmospheres (ATEX) is frequent in laboratories due to the use of inflammable products(gases or liquids). A regulation has been drafted in order to improve the health and safety of workers exposed to the ATEX risk. This article is dedicated to the implementation of this regulation within laboratories. The regulation, its principles and main requirements as well as the definition of ATEX zones are firstly listed. The implementation of this regulation in laboratories is then presented on the basis of general information and illustrated with a few cases of common situations.
Conjugated polymers can be used as sensitive layers in chemical (bio)sensors, enabling the selective detection of a wide range of chemical or biological molecules in both liquid and gaseous environments by converting the presence of target molecules into an electrochemical or optical signal. The article begins by introducing conjugated polymers and their key properties, followed by an explanation of the operating principles of sensors that incorporate them. It then explores recent advancements in sensor technologies, methods for combining polymers with other functional components to enhance detection capabilities, and a selection of application examples.
In the 1980s, quality assurance was introduced in analytical laboratories and method validation quickly became fundamental. It was compulsory to establish the confidence in achieved results. In this context, validation can take on two meanings depending on the field of application. On the one hand it is the essential in-house validation that any laboratory must implement. On the other hand, external validation, when several laboratories use the same method or are interested in the same analyte. This article is devoted to this last type and presents the validation techniques.
The air quality of private and collective closed spaces depends on several sources of pollution which are at the origin of various physical, chemical and biological pollutants. This article presents the measurement tools, on site and in the laboratory (recording, sampling and analysis, sensors) and the circumstances of these measurements: delivery of a new or renovated building, operation or environmental investigation after reporting. It indicates the action to be taken in the event that the reference values of the parameters measured are exceeded. It specifies the preventive actions on the sources of pollution, the renewal of the air in the premises and the air treatment systems.
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