A taste to see two three four five Wen asked.
       Look: Look packaging, color and sediment, counterfeit packaging little fine cooking oil, or the bottom of a dark color Shen minor impurities.
       News: One or two drops rubbing hands together. The smell of oil, indicating that quality problems, can not buy.
       Taste: Using chopsticks to take a drop of oil, carefully taste its flavor. Taste sour, bitter taste, such as the smell of burnt oil may be "waste oil."
       Listen: Take one or two drops of oil reservoir bottom, painted on the flammable paper, lit and listen to its sound. No sound is normal combustion qualified products; combustion is not normal, and issued a "creak" sound, excessive moisture, is substandard products; issued a "Slap A pair of" explosions burning oil shows that the water content of seriously overweight, and may is adulterated product, absolutely can not buy.
       Q: Q businesses purchase channels, ask for the purchase invoice or to find your local food hygiene supervision departments sample inspection report if necessary. Rapid detection of waste oil