I. Identification of Waxed Rice

Method 1: Rub your palm hard and insert it into the rice. There is a lot of rice ash on the hand after taking it out, which means that the rice is not waxed; If the palm is clean, the rice is waxed. Method 2: Water washing method: wash the rice in two containers respectively, and the washed rice water is white and turbid, indicating that there is no waxing; Taomi water is clear and waxy.

Second, the identification of soy sauce quality

Look: Good quality soy sauce is brownish red, shining in the light (red and black), while inferior soy sauce is dark and dull. Smell: Good quality soy sauce has a sauce flavor and a cool taste. Inferior soy sauce does not have these special flavors, and some even have an odor.

Try: add one part of soy sauce to three parts of anhydrous alcohol (medical alcohol with purity above 95%), shake it for a minute or two and then turn it upside down. Good soy sauce has massive precipitation, and poor (blended) soy sauce has little or no precipitation.

Third, the identification of rice flour quality

Fire can be used to detect whether gum is added to rice flour. Take out a rice noodle and light it with a lighter. If the rice flour is burnt, it may contain gum.

Fourth, the determination of alcohol content

Food quality inspection methods can not only identify the quality of products, but also detect the physical and chemical indicators of food. Then you can demonstrate the alcohol meter method on the spot and quickly measure the alcohol content of liquor, beer and wine.

Verb (abbreviation of verb) Identification of waste oil

Look: Look at the transparency, look at the color, the color is dark, turbid and has sediment. It may be waste oil that is easy to solidify at low temperature. The first detection trick is to pour a little oil on the popsicle, and the oil will soon solidify and adhere to the popsicle, probably made of waste oil. The second trick is to pour a little oil on the glass. If the oil flows slowly, there may be a problem.

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. It's probably that the cooking oil tastes bad and smells very weak.

Tasting: Take a drop of oil with chopsticks and taste it carefully. The oil with peculiar smell may be gutter oil, the edible oil containing gutter oil is not fragrant, and the residual oil residue is black carbon.

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. Abnormal combustion, excessive moisture and squeaking are unqualified products; When burning, there was a "crackling" explosion, indicating that the water content of the oil seriously exceeded the standard, which may be an adulterated product and will never be bought.