Home>ASTM Standards>ASTM F1374-92(R2020) pdf free download

ASTM F1374-92(R2020) pdf free download

ASTM F1374-92(R2020) pdf free download.Standard Test Method for Ionic/Organic Extractables of Internal Surfaces-IC/GC/FTIR for Gas Distribution System Components
1. Scope
1.1 This test method establishes a procedure for testing components used in ultra-high-purity gas distribution systems for ionic and organic surface residues. 1.2 This test method applies to in-line components contain- ing electronics grade materials in the gaseous form. 1.3 Limitations: 1.3.1 This test method is limited by the sensitivity of the detection instruments and by the available levels of purity in extracting solvents. While the ion and gas chromatographic methods are quantitative, the Fourier transform infrared spec- troscopy (FTIR) method can be used as either a qualitative or a quantitative tool. In addition, the gas chromatography (GC) and FTIR methods are used to detect hydrocarbons and halogenated substances that remain as residues on component internal surfaces. This eliminates those materials with high vapor pressures, which are analyzed per the total hydrocarbons test, from this test method. 1.3.2 This test method is intended for use by operators who understand the use of the apparatus at a level equivalent to twelve months of experience. 1.4 The values stated in SI units are to be regarded as the standards. The inch-pound units given in parentheses are for information only. 1.5 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 appro- priate safety, health, and environmental practices and deter- mine the applicability of regulatory limitations prior to use. Specific hazard statements are given in Section 6. 1.6 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
5. Apparatus
5.1 Materials: 5.1.1 Test Fluid—The purity offluid used for the extractions will determine the detection limit of the test. Therefore, extremely high purity fluids are required. At least 18.0 MΩ water [corrected for 18°C (64°F)] must be used for the ionic extractables determination. Total oxidizable carbon must be less than 50 ppbw. The water must be filtered through a 0.2-µm (or finer) filter. Electronics grade (or better) IPA is to be used for the organic extractables determination. 5.1.2 Spool Piece— a straight run of electropolished 316-L stainless steel tubing with no restrictions. The length of the spool piece shall be approximately 200 mm. The spool piece should be the same diameter as the test component. 5.1.3 Caps—used to seal the ends of the test component and spool piece are to be of 316-L stainless steel. For stub end components, 316-L stainless steel compression fittings with nylon or polytetraflouroethylene ferrules are to be used. For face seal fittings, stainless steel gaskets must be used. 5.1.4 Gloves—made of powder free latex or natural rubber and resistant to the test fluids used in this test method. 5.2 Instrumentation: 5.2.1 Ion Chromatograph—The IC is an analytical instru- ment that detects ionic species in deionized (DI) water. The eluant is passed through a column containing ion exchange resin. A conductivity detector is used to detect the ionic species. The retention times of the various ionic species are used to identify the species. The area under the respective peak yields the quantity ofthe species in the eluant. This test method uses a column for mono- and polyvalent anions and a column for mono- and polyvalent cations. Asuppressor column may be used to increase sensitivity. 5.2.2 Gas chromatograph—The GC is an analytical instru- ment that detects organic species in the gas phase. A liquid sample is injected and heated to the vapor phase. The sample is then passed through a column containing an adsorbent. A carrier gas is used as the mobile phase.

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