天然气标准-分析测试百科网

ASTM D7663-12(2024) 用于蒸汽侵入评估的包气带中活性土壤气体采样的标准规范

1.1 Purpose— This practice covers standardized techniques for actively collecting soil gas samples from the vadose zone beneath or near dwellings and other buildings. 1.2 Objectives— Objectives guiding the development of this practice are: (1) to synthesize and put in writing good commercial and customary practice for active soil gas sampling, (2) to provide an industry standard for soil gas sampling performed in support of vapor intrusion evaluations that is practical and reasonable. 1.3 This practice allows a variety of techniques to be used for collecting soil gas samples because different techniques may offer certain advantages for specific applications. Three techniques are presented: sampling at discrete depths, sampling over a small screened interval, and sampling using permanent vapor monitoring wells. 1.4 Some of the recommendations require knowledge of pressure differential and tracer gas concentration measurements. 1.5 The values stated in SI units shall be regarded as standard. Other units are shown for information only. 1.6 This practice does not address requirements of any local, regional, state, provincial, or national regulations or guidance, or both, with respect to soil gas sampling. Users are cautioned that local, regional, state, provincial, or national guidance may impose specific requirements that differ from those of this practice. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This practice offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances. This ASTM practice is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project's many unique aspects. The word “Standard” in the title means only that the document has been approved through the ASTM consensus process. 1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Standard Practice for Active Soil Gas Sampling in the Vadose Zone for Vapor Intrusion Evaluations

ICS: 75.060
CCS
发布: 2024-06-07
实施

BS EN ISO 2620:2024 天然气分析生物甲烷采用火焰离子化和/或质谱检测器的热解吸气相色谱法测定 VOC

Analysis of natural gas. Biomethane. Determination of VOCs by thermal desorption gas chromatography with flame ionization and/or mass spectrometry detectors

ICS: 75.060
CCS
发布: 2024-04-30
实施: 2024-04-30

BS ISO 11626:2024 天然气硫化合物的测定紫外吸收法测定硫化氢含量

Natural gas. Determination of sulfur compounds. Determination of hydrogen sulfide content by UV absorption method

ICS: 75.060
CCS
发布: 2024-03-31
实施: 2024-03-31

T/QGCML 3334-2024 天然气加臭剂-四氢噻吩

本文件规定了天然气加臭剂-四氢噻吩的产品结构式、技术要求、试验方法、检验规则、标志、使用说明书、包装、运输、贮存和保质期。本文件适用于四氢呋喃经过硫化氢硫化制得的四氢噻吩。主要应用领域是天然气加臭剂。

Natural gas odorant-tetrahydrothiophene

ICS: 75.060
CCS: B072
发布: 2024-03-13
实施: 2024-03-28

ISO 11626:2024 天然气

This document describes the test method for the determination of hydrogen sulfide content in natural gas by ultraviolet (UV) absorption method. This document applies to the determination of hydrogen sulfide content in natural gas, in the range from 1 mg/m3 to 50 mg/m3.

Natural gas — Determination of sulfur compounds — Determination of hydrogen sulfide content by UV absorption method