Manufacturer of refined vegetable oil equipment, Jinzheng Grain & Oil, today educates consumers on how to identify and purchase high-quality edible oil.

Sensory identification of various edible vegetable oils: look, smell, and taste.
First, look: Check the label. Labels usually display the type of edible oil, processing method, grade, production date, and whether genetically modified ingredients are used. Observe the appearance. When the ambient temperature is above 20°C, edible vegetable oils appear clear and transparent, without cloudiness, sediment, or suspended particles. When the ambient temperature is below 20°C, some edible oils (soybean oil, rapeseed oil, sesame oil, etc.) remain clear and transparent, with no cloudiness, sediment, or suspended particles. Some oils may show some sediment or suspended particles (peanut oil, rapeseed oil, etc.), which is normal.

Second, smell: After opening the oil barrel (or bottle), you can smell the unique aroma of the oil. You can also drop a few drops on your palm, rub your hands together, and smell carefully. Oil that has an off or rancid smell indicates a quality problem.

Third, taste: Using a clean chopstick or glass rod, drop a few drops of oil and place it on the front part of your tongue to taste.

Can edible oil that has coagulated or frozen still be consumed?

Refined vegetable oil equipment: Fats are triglycerides composed of fatty acids. Because the carbon chain lengths of fatty acids in triglycerides differ, the crystallization temperatures vary, and crystals form gradually, showing as white flocculent, opaque paste, white sediment, white crystals, and other forms. These are all normal physical phenomena.

Some consumers worry that frozen oil looks unappealing, but this concern is completely unnecessary. With temperature changes, any edible oil can experience some degree of freezing; this is a physical characteristic of the oil itself. Crystal formation may occur due to conditions during transportation and storage (for example, lower temperatures in northern winters can cause edible oil on trucks to freeze more easily, and oil placed in a north-facing kitchen can crystallize; it also depends on the type of oil). Freezing does not affect the taste or quality of the oil at all. For convenient use, it is recommended that consumers keep edible vegetable oil in an environment at 20°C during winter.