High performance liquid chromatography method for determining residual amount of ningnanmycin in rice
A high-performance liquid chromatography and ningnamycin technology, which is applied in the field of high-performance liquid chromatography detection for the determination of ningnamycin residues in rice, can solve the problems of inability to be widely popularized and applied, high operational requirements for test personnel, and high detection costs. , to achieve the effect of efficient and fast purification operation, reduced detection cost and good repeatability
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[0021] The scheme of the present application is further described in conjunction with specific examples as follows:
[0022] A high-performance liquid chromatography detection method for measuring Ningnanmycin residue in rice, comprising the following steps:
[0023] (1) Preparation of standard solution: Accurately draw 10 μL of 1000mg / L Ningnanmycin standard solution, dilute with methanol to 1mL, and then dilute with mobile phase to prepare a series of Ningnanmycin standard solutions with concentration gradients for high-efficiency Liquid chromatography assay.
[0024] (2) Extraction and purification: Weigh 10g of uniform sample into a 50mL stoppered centrifuge tube, add 20mL of acidified methanol solution (adjust the pH to 4.5 with acetic acid), 6g of anhydrous magnesium sulfate, and 1g of sodium chloride. / min high-speed centrifugation for 10 min, take 10 mL of the supernatant and blow it to near dryness with nitrogen at 40 °C, redissolve with the mobile phase to 1 mL, pas...
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