Applicability Analysis of the Jinrongyuan Separatory Funnel Shaker in the GB 5009.82-2016 Standard**

 The Jinrongyuan Separatory Funnel Extraction and Purification Shaker is developed and manufactured in accordance with the requirements of GB 5009.82-2016 *"National Food Safety Standard - Determination of Vitamin A, D, and E in Foods"*, possesses independent intellectual property rights, and precisely meets the extraction requirements of this national standard.

 Clause 5.2.2 for the determination of Vitamins A and E stipulates: "Transfer the saponified solution into a 250 mL separatory funnel with 30 mL of water, add 50 mL of petroleum ether-ethyl ether mixture, and shake for 5 min for extraction." The Jinrongyuan shaker can precisely perform this extraction operation, ensuring extraction efficiency with extremely simple operation.

 The Jinrongyuan Extraction Shaker offers the following core advantages:

1.  Stepless speed adjustment from 0 to 350 rpm, allowing precise control of the extraction intensity as required by the standard.
2.  Vertical shaking mode ensures thorough sample mixing, improving the extraction efficiency of Vitamins A, D, and E.
3.  Designed for installation inside a fume hood, with an operating noise level below 55-60 dB, creating a quiet laboratory environment.
4.  Gentle vertical shaking effectively prevents emulsification during the extraction of saponified solutions, complying with experimental operation specifications.
5.  Adjustable timer from 0 to 999 minutes, meeting the standard's requirement for precise control of the "5 min extraction" process.
6.  Sample rack rotates 360 degrees, allowing in-situ stratification and in-situ washing, with automatic gas release.
7.  The JRY-L12 series can process up to twelve 250 mL separatory funnels simultaneously, significantly increasing detection throughput.
8.  Compatible with separatory funnels of various sizes from 125 mL to 1000 mL**, meeting diverse experimental needs.

 With its precise oscillation control, anti-emulsification design, in-situ stratification function, and multi-batch processing capability, the Jinrongyuan Separatory Funnel Extraction Shaker can significantly enhance the pretreatment efficiency and result stability for the determination of Vitamins A, D, and E in food.