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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: • ...
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Functions of oil in transformer
Primary function of oil is insulation. It provides the electrical insulation for parts of transformer. It insulates the windings from each other and from the core. The windings and core are separated by paper which is soaked by the oil. The advantage of oil insulation is that it heals up if it breaks ...
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Du Noüy Ring for Liquid/Gas and Liquid/Liquid interfaces
The universally accepted technique for measuring interfacial tension is by the Du Noüy ring which is a precise geometry made of Pt-Ir. International standards for both the liquid/gas and liquid/liquid interface, from a range of industries, for example, electrical insulation and electronics, water and ...
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What is interfacial tension?
Interfacial Tension is a measurement of the cohesive (excess) energy present at an interface arising from the imbalance of forces between molecules at an interface (gas/liquid, liquid/liquid, gas/solid, liquid/solid). When two different phases (gas/liquid, liquid/liquid, gas/solid or liquid/solid) are ...
