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ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer
ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer titration method11 Expression of resultsReport the mass fraction of water in the sample to the nearest 0.001 % (m/m) 12 Precision12.1 Repeatability, rThe difference between two test results obtained by the same operator ...
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ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer
ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer titration method9 ProcedureImmediately after sample preparation (see 6.2), use a clean, dry syringe (5.3) to withdraw at least three portions of the laboratory sample and discard to waste. Immediately withdraw a 1 ml to ...
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ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer
ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer titration method6 Sampling and sample preparation (see annex A)6.1 SamplingSamples shall be drawn in accordance with ISO 3170, ISO 3171, or an equivalent national standard.If sampling is carried out manually, use a clear ...
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ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer
ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer titration method4 Chemicals and materials4.1 Molecular sieve pellets, type 4A.Activate in an oven at 200 °C to 250 °C for 4 h. Transfer immediately to a dry sealable bottle or desiccator and allow to cool.4.2 Xylene, reagent ...
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ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer
ISO 12937 Petroleum products - Determination of water - Coulometric Karl Fischer titration methodWARNING - The use of this International Standard may involve hazardous materials, operations and equipment. This International Standard does not purport to address all of the safety problems associated with ...
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ISO 3735 Crude petroleum and fuel oils - Determination of sediment - Extraction
ISO 3735 Crude petroleum and fuel oils - Determination of sediment - Extraction method10 Expression of resultsReport the sediment content of the sample, as "sediment by extraction", as a percentage by mass, rounded to the nearest 0.01 % (m/m).Report that "the sample mixing procedure was performed in ...
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ISO 3735 Crude petroleum and fuel oils - Determination of sediment - Extraction
ISO 3735 Crude petroleum and fuel oils - Determination of sediment - Extraction method8 Procedure8.1 Place a test portion of approximately 10 g in the thimble (5.1.3) immediately after the laboratory sample has been mixed. Do not attempt to adjust the estimated 10 g portion to any exact predetermined ...
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ISO 3735 Crude petroleum and fuel oils - Determination of sediment - Extraction
ISO 3735 Crude petroleum and fuel oils - Determination of sediment - Extraction method4 Reagents and materials4.1 Methylbenzene (toluene), (C6H5CH3), conforming to grade 2 of ISO 5272.5 ApparatusUsual laboratory apparatus and glassware, together with the following:5.1 Extraction apparatus, as illustrated ...
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ISO 3735 Crude petroleum and fuel oils - Determination of sediment - Extraction
ISO 3735 Crude petroleum and fuel oils - Determination of sediment - Extraction methodWARNING - The use of this International Standard may involve hazardous materials, operations and equipment. This International Standard does not purport to address all of the safety problems associated with its use. ...
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ISO 3734 Petroleum products - Determination of water and sediment in residual fu
ISO 3734 Petroleum products - Determination of water and sediment in residual fuel oils - Centrifuge method8 Expression of resultsRecord the final volume of water and sediment in each tube and report the sum of these two readings rounded according to 7.5 as the percentage volume of sediment and water. ...
