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BS-EN-61198 Methods for the determination of 2-furfural and related compounds
Checking extraction and recoveryMethod B assumes complete retention of the analytes by the silica cartridge and complete recovery upon elution with HPLC eluent.It is, however, good practice to evaluate the performance of the cartridges from batch to batch and the performance of the method with strongly ...
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BS-EN-61198 Methods for the determination of 2-furfural and related compounds
13 Minimum level of detection Following the methods described in clause 9, the minimum concentraion of the five analytes which can be determined in unused mineral oil shall be 0.05mg/kg or lower. In considerably oxidized samples the presence of polar compounds having similar retention times to the analytes ...
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BS-EN-61198 Methods for the determination of 2-furfural and related compounds
10 Calibration Standard solutions in oil are required to calibrate analyses of extracts obtained from method A. Standard solutions either in oil or in chromatographic eluent may be used with extracts prepared in accordance with method B. 10.1 Standard solutions in oil 10.1.1 Preparation of stock solution ...
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BS-EN-61198 Methods for the determination of 2-furfural and related compounds
9 Operating procedure9.1 Extraction of the analytes9.1.1 Method A: liquid-liquid extractionExtract approximately 20ml of oil sample, weighed to the nearest 0.1g, with 5ml of acetonitrile, measured by a pipette, in a 25ml stoppered cylinder, shaking the samples on a mechanical shaker for at least 2min.Allow ...
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BS-EN-61198 Methods for the determination of 2-furfural and related compounds
6 Reagents - HPLC grade acetonitrile; - HPLC grade methanol; - HPLC grade water; - HPLC grade acetic acid; - Analytical grade n-pentane; - Analytical grade analytes listed in clause 8. 7 Symbols and units Fi Detector response factor for each of the analytes Ris Detector response for each analyte in ...
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BS-EN-61198 Methods for the determination of 2-furfural and related compounds
3 Sampling Oil samples are collected in accordance with IEC 475 and IEC 567. Samples should be protected from direct light. 4 Labelling of samples Samples shall be labelled in accordance with IEC 567. 5 Apparatus 5.1 Genearl equipment: - laboratory glassware; - beakers or Erlenmeyer flasks; - volumetric ...
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BS-EN-61198 Methods for the determination of 2-furfural and related compounds
Introduction The degradation of cellulosic materials constituting the solid insulation of oil-filled electrical equipment leads to the formation of several compounds specific to cellulose decomposition, such as sugars and furan derivatives. The furan derivatives, of which a large proporation remains ...
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Installation environment of transformer oil dissolved gas analyzer GC2010D
The room temperature of the selected installation place should be 10℃ - 35℃. The relative humidity should be below 85% (45% - 65% recommended). The selected place should be protected from corrosive gas, strong magnetic field, direct sunlight and vibration, and also should be equipped with ventilation ...
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Furan Testing - ASTM D5837
When the cellulosic insulation materials within a transformer experience degradation, some of the products formed are derivatives of the aromatic compound called furan. Furan is a heterocyclic aromatic system consisting of four carbons and one oxygen in a five membered ring with each of the carbons having ...
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Simple introduction to Furan Testing
Simple introduction to Furan Testing Furan testing shows the condition of the paper insulation with an oil sample. Over time, the cellulose insulating material will experience degradation. An aromatic compound is produced during this degradation called furan. Testing is performed for five furans: • ...
