According to the introduction of the Ministry of Health, in accordance with the unified deployment of the the State Council Food Safety Office, the Ministry of Health organized the Ministry of Science and Technology, the State Administration for Industry and Commerce, the General Administration of Quality Supervision, Inspection and Quarantine, the Food and Drug Administration, the Grain Bureau and the China CDC to jointly study and formulate a demonstration plan for the inspection method of "gutter oil" and set up an inspection method demonstration expert group including authoritative experts and relevant institutions in the fields of oil processing, food safety, sanitary inspection and chemical analysis to scientifically demonstrate the inspection method developed by relevant technical institutions. When hogwash oil enters the market, consumers should learn sensory identification. According to experience, edible vegetable oil can be identified by looking, smelling, tasting, listening and asking.
Look at that. Look at the transparency, pure vegetable oil is transparent, and the transparency will be reduced due to the mixing of alkaline grease, wax and impurities in the production process; Look at the color, pure oil is colorless, oil will have color because the pigment in oil is dissolved in oil during production; Look at the sediment, its main component is impurities.
Smell. Each oil has its own unique smell. You can put a drop or two of oil on your palm, rub your hands together and smell it carefully while it is hot. Odd oil indicates that there is a problem with the quality, and it is likely that the swill oil has an odor; You can't buy it if it smells of mineral oil.
Try it. Take a drop of oil with chopsticks and taste it carefully. Sour oil is unqualified, bitter oil has been rancid, and oil with peculiar smell may be "swill oil".
Listen: Take one or two drops of oil from the bottom of the reservoir, spread it on flammable paper, light it and listen to its sound. Products with normal combustion and no noise are qualified products; If the combustion is abnormal, it will make a "squeaky" sound, indicating that the water content exceeds the standard and it is an unqualified product; When burning, there is a "crackling" explosion, indicating that the water content of the oil is seriously exceeding the standard, which may be an adulterated product and must not be purchased.
Q: Ask the merchant about the purchase channel, ask for the purchase invoice or check the sampling test report of the local food hygiene supervision department if necessary.