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prEN ISO 5667-3 Viešoji apklausa

Komentavimo iki data 2026-11-24

Vandens kokybė. Mėginių ėmimas. 3 dalis. Vandens mėginių konservavimas ir tvarkymas (ISO/DIS 5667-3:2026)

This document specifies the general requirements for sampling, preservation, handling, transport and storage of all water samples for physicochemical, chemical, hydrobiological and microbiological analyses and determination of radiochemical analytes and activities. Guidance on the validation of storage times of water samples is provided in ISO/TS 5667-25 [2]. This document is not applicable to water samples intended for ecotoxicological assays, biological assays (which is specified in ISO 5667-16 [4]), passive sampling (which is specified in ISO 5667-23 [5]) and microplastics (which is specified in ISO 5667-27 [6]). This document is particularly appropriate when samples cannot be analysed on site and have to be transported to a laboratory for analysis.

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prEN 18397 Viešoji apklausa

Komentavimo iki data 2026-10-20

Anglies dioksido srautų anglinio plieno vamzdynuose savybės

This document specifies requirements for the composition of CO2 streams relevant to the integrity of carbon steel pipeline systems, including limits on non-condensable components. It establishes the framework conditions for the supply, transportation and distribution of CO2 streams. Considerations related to the health effects of the CO2 stream (e.g. toxicity), environmental impact, or other properties of impurities are outside the scope of this document.

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EN ISO 14020:2023/prA1 Archyvuotas

Komentavimo iki data 2026-10-04

Produktams skirti aplinkosauginiai pareiškimai ir jų programos. Principai ir bendrieji reikalavimai. 1 keitinys (ISO 14020:2022/DAM 1:2026)

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prEN 13528 Archyvuotas

Komentavimo iki data 2026-10-04

Aplinkos oro kokybė. Difuziniai ėmikliai dujų koncentracijoms nustatyti. Reikalavimai, patvirtinimo metodai ir naudojimas

This document specifies performance requirements, validation methods and provides general instructions on the use of diffusive samplers for the determination of the concentration of gases in ambient air. This document applies to all stages of the measuring procedure, including preparation, deployment, transportation and storage. It includes general principles applicable to diffusive sampling and analysis. It enables manufacturers and users to adopt a consistent approach to sampler validation and provides a framework for the assessment of sampler performance.

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prEN ISO 13160 Archyvuotas

Komentavimo iki data 2026-10-04

Vandens kokybė. Stroncis 90 ir stroncis 89. Tyrimo metodai naudojant blyksnių skystyje skaičiavimą arba proporcinį skaičiavimą (ISO/DIS 13160:2026)

Warning — Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to determine the applicability of any other restrictions. Warning — It is absolutely essential that tests conducted according to this document be carried out by suitably trained staff. This document specifies methods to determine 90Sr and 89Sr by liquid scintillation counting (LSC) or proportional counting (PC) in supply water, drinking water, rainwater, surface and ground water, marine water, as well as cooling water, industrial water, domestic, and industrial wastewater after proper sampling, handling and test sample preparation. The detection limit depends on the sample volume, the instrument used, the sample counting time, the background count rate, the detection efficiency and the chemical yield. The method described in this document, using currently available LSC and PC instruments, has a detection limit of approximately 2 mBq·l−1 and 10 mBq·l−1 for 90Sr and 89Sr, respectively, for a volume of 2 l and a measuring time of 60 000 s, which is lower than the WHO criteria for safe consumption of drinking water (100 Bq·l−1 for 89Sr and 10 Bq·l−1 for 90Sr)[4]. The methods described in this document are applicable in the event of an emergency situation. When contamination contains fresh fission products, the contribution of 89Sr to the total amount of radioactive Sr is not negligible. This document provides test methods to determine the activity concentration of 90Sr in presence of 89Sr, and to determine the activity concentration of 90Sr in large volume of water sample (>50 L). The analysis of 90Sr and 89Sr adsorbed to suspended matter is not covered by this method. Filtration of the test sample and a chemical separation are required to separate and purify Sr from a test portion of the sample as the analysis of 90Sr and 89Sr adsorbed to suspended matter is not covered by this method. It is the user’s responsibility to ensure the validity of this test method selected for the water samples tested.

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