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Scope This standard specifies the method for directly determining the water content in petroleum products and hydrocarbon compounds using an automatic titrator. The direct titration method for determining water content ranges from 10mg/kg to 25000mg/kg. This standard also specifies a method for indirectly determining the water content of the sample. The water in the sample is separated by heating, and then transported to a Karl Fischer titrator for analysis by a dry gas carrier. Interference of thiols, sulfides, sulfur, and other compounds with the test method This standard is applicable to the determination of water content in additives, lubricants, base oils, automatic transmission fluids, hydrocarbon solvents, and other petroleum products using commercially available Karl Fischer Coulomb reagents. By selecting the appropriate sample injection amount, the water content measurement range of this standard ranges from milligrams per kilogram level to mass percentage level Normative references The following documents are essential for the application of this document. . For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this documentGB/T 1884 Laboratory Determination of Density of Crude Oil and Liquid Petroleum Products (Densimeter Method) (GB/T 1884-2000-eqv ISO 3675:1998) GB/T 1885 Petroleum Measurement Tables (GB/T 1885-1998, eqv ISO 91-2:1991) GB/T 4756 Manual Sampling Method for Petroleum Liquids (GB/T 4756-1998, eqv ISO 3170:1988) GB/T 6682 Specification and Test Methods for Analytical Laboratory Water (GB/T 6682-2008, ISO 3696:1987, MOD) SH/T 0604 Method for Determining the Density of Crude Oil and Petroleum Products (U-shaped Vibrating Tube Method) (SH/T 0604-2000, eqv ISO 12185:1996) ASTM D5854 Standard Practice for Mixing and Handling of Liquid Samples of Petroleum and Petroleum Products ASTM E203 Standard Method for Determining Water Content (TestMethodforWaterUsingVolumetric Karl Fischer Titration) Function of testing report:1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report 2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems100% inspection and testing process:1. Telephone communication and confirmation of requirements 2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:1. The testing industry is fully covered, meeting different testing needs 2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate 4. Free initial testing, with no testing fees charged 5. Self service order delivery for free on-site sampling 6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China
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