The basis of judging the grading of rapeseed - chlorophyll rapeseed oil is the most important edible vegetable oil in China, accounting for about 35% of the total consumption of edible vegetable oil in China, and the quality index of rapeseed oil is indeed the chlorophyll content, because the chlorophyll content Affected by many aspects of the environment, the maturity of the pods on plants directly affects the chlorophyll content. The criteria for Canadian rapeseed exports are: first-grade rapeseed chlorophyll content is less than 30mg/kg, chlorophyll content is greater than 30mg/kg is secondary, chlorophyll content can be measured using a chlorophyll meter.
Chlorophyll in oil is a photosensitizer that can absorb light energy into an excited state, and then transfer energy to the ground state oxygen molecules to form high-energy monooxygen molecules, promote the oxidation reaction of oils and fats, resulting in the loss of oil; In addition, chlorophyll can make rapeseed oil Dark green. The level of chlorophyll directly affects the quality of rapeseed oil and the cost of rapeseed oil processing. The higher the chlorophyll content of rapeseed, the more complex the decolorization and deodorization process in oil processing, and the higher the processing cost, the more easily rapeseed oil is oxidized and degenerated. Therefore, the detection technology of chlorophyll content in rapeseed has become an important technology for the quality control of rapeseed. In the processing of rapeseed, when the chlorophyll content in rapeseed is high, the oil will produce yellow-brown (or tan), rapeseed The deeper color of the oil is dark green, which affects the appearance quality and sensory stability of the rapeseed oil. At the same time, it leads to rancidity and deterioration of the oil. The stability is greatly reduced, and the product shelf life is greatly shortened. High chlorophyll content increases the time and difficulty of processing, and the cost increases accordingly. Appropriate control of chlorophyll content can reduce processing costs, increase storage time of rapeseed oil, and use chlorophyll meter for the detection of chlorophyll content.
The leaf area also determines the chlorophyll content to a certain extent, and all factors in the environment determine the direct determination of chlorophyll content to a certain extent. Leaf area measurements can be performed using a handheld leaf area meter. By rationally controlling the environment and leaf area, controlling the chlorophyll content and improving the quality of rapeseed oil.
Chlorophyll in oil is a photosensitizer that can absorb light energy into an excited state, and then transfer energy to the ground state oxygen molecules to form high-energy monooxygen molecules, promote the oxidation reaction of oils and fats, resulting in the loss of oil; In addition, chlorophyll can make rapeseed oil Dark green. The level of chlorophyll directly affects the quality of rapeseed oil and the cost of rapeseed oil processing. The higher the chlorophyll content of rapeseed, the more complex the decolorization and deodorization process in oil processing, and the higher the processing cost, the more easily rapeseed oil is oxidized and degenerated. Therefore, the detection technology of chlorophyll content in rapeseed has become an important technology for the quality control of rapeseed. In the processing of rapeseed, when the chlorophyll content in rapeseed is high, the oil will produce yellow-brown (or tan), rapeseed The deeper color of the oil is dark green, which affects the appearance quality and sensory stability of the rapeseed oil. At the same time, it leads to rancidity and deterioration of the oil. The stability is greatly reduced, and the product shelf life is greatly shortened. High chlorophyll content increases the time and difficulty of processing, and the cost increases accordingly. Appropriate control of chlorophyll content can reduce processing costs, increase storage time of rapeseed oil, and use chlorophyll meter for the detection of chlorophyll content.
The leaf area also determines the chlorophyll content to a certain extent, and all factors in the environment determine the direct determination of chlorophyll content to a certain extent. Leaf area measurements can be performed using a handheld leaf area meter. By rationally controlling the environment and leaf area, controlling the chlorophyll content and improving the quality of rapeseed oil.
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