Gasoline mechanical impurity and moisture detection

Does gasoline contain mechanical impurities and moistureIt is one of the indicators of gasoline quality,alsoGasoline CleanlinessThe indicators.gasolineMechanical impurity detectionIt refers to all impurities present in oil that are insoluble in specified solvents, such as mud, sand, dust, iron filings, fibers, and certain insoluble salts. Moisture refers to the amount of water present in petroleum products.The finished gasoline refined by the refinery does not contain mechanical impurities and moistureHowever, during storage, transportation, and use, gasoline is inevitably contaminated by external factors, causing mechanical impurities and moisture to enter the gasoline. Mechanical impurities in gasoline may clog the carburetor orifice and gasoline filter；At the same time, it will also exacerbate the wear of the carburetor orifice and cylinder piston components. The excessive presence of moisture can cause corrosion to the engine and may burn out spark plugs.The moisture in gasoline may freeze in winterIn severe cases, it can clog the filter or oil circuit, and even cause fuel supply interruption.in additionMoisture and accelerated corrosion of mechanical components，Dissolved antioxidantAccelerate gasoline oxidation and render additives such as export agents ineffective.GB17930-2016Regulations on Automotive GasolineMechanical impurities and waterFor nothing.

Check for mechanical impurities and moisture in gasoline,Generally, visual inspection is used, that isInject the sampleenter100mLObservation in a glass graduated cylinderIt should be transparent, free from suspended and settled mechanical impurities and moisture. When there are objections, mechanical impurities can be handled according toGB/T511Conduct measurement，Moisture can be adjusted according toGB/T260Conduct measurements.

according toGB/T 511When measuring mechanical impurities using the weight method, a certain amount of the sample is weighed, dissolved in the solvent used, and filtered through a filter paper or microporous glass with a constant weight. The impurities left on the filter paper or microporous glass are called mechanical impurities. Precautions for mechanical impurity determination include: uniform sampling, appropriate sample size, ensuring cleanliness of solvents and instruments used, standardized filtration and other testing operations, and washing of filter paper with sediment.

according toGB/T 260When measuring moisture content,The summary of the experimental method is: to be testedsampleandWith waternot match溶ofsolventCo heating reflux, solventThe water in the sample can be carried out. Continuously condensingsolventSeparated from water in the receiver, water settles in the graduated receiver,solventReturn to the distiller.