{"id":202287,"date":"2024-10-19T12:56:03","date_gmt":"2024-10-19T12:56:03","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-d7649-2019\/"},"modified":"2024-10-25T05:33:58","modified_gmt":"2024-10-25T05:33:58","slug":"astm-d7649-2019","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-d7649-2019\/","title":{"rendered":"ASTM-D7649 2019"},"content":{"rendered":"

ASTM D7649-19<\/h3>\n

Withdrawn Standard: Standard Test Method for Determination of Trace Carbon Dioxide, Argon, Nitrogen, Oxygen and Water in Hydrogen Fuel by Jet Pulse Injection and Gas Chromatography\/Mass Spectrometer Analysis (Withdrawn 2023)<\/h4>\n
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ASTM D7649<\/h4>\n

Scope<\/strong><\/p>\n

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1.1<\/span> This test method describes a procedure primarily for the determination of carbon dioxide, argon, nitrogen, oxygen, and water in high pressure fuel cell grade hydrogen by gas chromatograph\/mass spectrometer (GC\/MS) with injection of sample at the same pressure as sample without pressure reduction, which is called \u201cJet Pulse Injection.\u201d The procedures described in this method were designed to measure carbon dioxide at 0.5\u2009micromole per mole (ppmv), Argon 1 ppmv, nitrogen 5 ppmv, oxygen 2 ppmv, and water 4 ppmv.<\/p>\n<\/p><\/div>\n

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1.2<\/span> Units\u2014<\/span>The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.<\/p>\n<\/p><\/div>\n

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1.3<\/span> The mention of trade names in standard does not constitute endorsement or recommendation for use. Other manufacturers of equipment or equipment models can be used.<\/p>\n<\/p><\/div>\n

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1.4<\/span> 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.<\/i><\/p>\n<\/p><\/div>\n

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1.5<\/span> 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.<\/i><\/p>\n<\/p><\/div>\n

Keywords<\/strong><\/p>\n

gas chromtography\/mass spectrometer detection; high pressure hydrogen; jet pulse injection;<\/p>\n

ICS Code<\/strong><\/p>\n

ICS Number Code 27.075 (Hydrogen technologies)<\/p>\n

DOI:<\/strong> 10.1520\/D7649-19<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

D7649-19 Standard Test Method for Determination of Trace Carbon Dioxide, Argon, Nitrogen, Oxygen and Water in Hydrogen Fuel by Jet Pulse Injection and Gas Chromatography\/Mass Spectrometer Analysis<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
ASTM<\/b><\/a><\/td>\n2019<\/td>\n11<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":202292,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2637],"product_tag":[],"class_list":{"0":"post-202287","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-astm","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/202287","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/202292"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=202287"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=202287"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=202287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}