基于电导率的地沟油快速鉴别方法的改进.pdf

Applied Physics 应用物理, 2013, 3, 162-165 /10.12677/app.2013.38030 Published Online October 2013 (/journal/app.html) Improvement on the Rapid Detection Method of Waste Oil Based on Electrical Conductivity Xueyao Hu, Cinan Wu Department of Physics, Guizhou University, Guiyang Email: 814059200@ Received: Jul. 29th th rd , 2013; revised: Aug. 10 , 2013; accepted: Aug. 23 , 2013 Copyright © 2013 Xueyao Hu, Cinan Wu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract: Using the qualified edible oil and waste oil for sample, we explore the influence of oil types, temperature, the ratio of water and oil for electrical conductivity, to find out a test condition which can faster and more accurately detect grease conductivity. This method adopted in the experiment is that inject n-hexane 25 ml, 30 ml deionized water, then vibrate 30 min in 70˚C thermostatic water bath to separate the oil and water phase, then put the water phase in 70˚C thermostatic water bath measuring the conductivity when the 10 ml of sample is taken. On this condition, it can extract clearer water which can make the pole be completely submerged when detection, thus it reduces the error because the pole can not be completely submerged in water. Because the water bath temperature has risen higher, the clear water can be fleetly separated from mixture sample after vibration, hence it shortens the time of experiment. Clear water reduced the influence of oil droplets for conductivity detection, and the rising bath temperature of vibration can make impurities or