Application of automatic homogenizer with liquid separation function in detection of vegetable and fruit pesticide residues
Abstract: In the detection of organophosphorus, organochlorine, pyrethroid and carbamate pesticide residues in vegetables and fruits, manual high-speed dispersers are often used in the pre-treatment process. Cleaning the cutter head is time consuming and laborious. Auto HG-24plus with liquid separation function automatic homogenizer, 4 samples at a time, 24 samples can be processed in one cycle, no need to manually add acetonitrile, no manual care, high efficiency and high energy.
When the NY/T761 standard is implemented to detect organophosphorus, organochlorine, pyrethroid and carbamate pesticide residues in vegetables and fruits, high-speed dispersers are often used in the pretreatment process to homogenize the samples. To improve extraction efficiency. A comparison of manual homogenization and instrument auto-homogenization processes is performed below to treat 24 samples as an example.
Manual homogenization: 24 samples were weighed in sequence, 25 g each, placed in a 100 ml sample tube, labeled; then 50 ml acetonitrile was added sequentially with a vial dispenser to be treated. Fix a manual dispersing machine, take the No. 1 sample tube and fix it, insert the dispersing machine head into the sample tube, open the dispersing machine, adjust the speed to 17000 rpm, homogenize for 2 min, reduce the speed of the dispersing machine, and remove the No. 1 Sample tube, use a clean empty sample tube to connect the water to the same height of the sample, extend the dispersing cutter into the water, increase the speed of the disperser, rotate for 30s, change the water, repeat 3 times; then take the clean empty sample tube to sample the acetone. At the same height, the dispersing cutter head is inserted into the acetone, the rotation speed of the dispersing machine is adjusted, the rotation speed is turned for 30 s, the rotation speed of the dispersing machine is lowered, and the acetone sample tube is taken off; the sample No. 2-24 is homogenized in turn according to the above steps. The whole process is manual, laborious and inefficient.
Fully automatic homogenization: Weigh 24 samples in turn, each 25g, placed in a 100ml sample tube, marked; placed on the Auto HG-24plus with a liquid separation function fully automatic homogenizer sample tray. Set on the touch screen: homogenization time 2min, sink cleaning 1min, organic solvent cleaning 30s, ultrasonic cleaning 30s, acetonitrile filling 50ml, set the sample row 6 rows, start the instrument. Auto HG-24plus with liquid separation function automatic homogenizer will automatically fill the sample with acetonitrile 50ml in the first row, then homogenize for 2min, then automatically clean in the sink, organic solvent tank cleaning, ultrasonic tank cleaning; The second row of samples was processed as described above. There is no manual care and operation in the whole process, which truly liberates the labor force and improves work efficiency.
Shenzhen Xinrui Technology Development Co., Ltd.
We're Professional Supplier Extract Powder manufacturers and suppliers in China specialized in providing high-quality products at low price. We warmly welcome you to buy or wholesale bulk Supplier Extract Powder for sale here from our factory. For a free sample, contact us now.
Supplier Extract Powder,Supplier Extract ,Supplier Powder Manufacturer in China
Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.apipepdites.com