Application of AutoHG-24 plus automatic homogenizer in Shandong entry and exit industry
There are many industries in China that have tested the detection of pesticide residues in vegetables and fruits, but in different industries, when preparing for pesticide residue, the methods of sample preparation are different. The detection mechanism of the agricultural mouth will first pulverize the sample first with soymilk and other equipment. The particle size of the pulverized sample is less than 1 mm, and then the pulverized sample is taken from 10-50 g, and then 15-100 ml of solvent is added, and the sample is fully automated. The sample holder of the device is homogenized and homogenized. The homogenization of this fully automatic homogenizer is the most standard.
However, when the pesticides of vegetables and fruits were tested in the entry-exit industry in Shandong, the preparation of samples was much rougher. The first is to simply crush the sample with a pulverizer. The size of the broken sample is 3-5mm! Add the solvent and place it on a fully automatic homogenizer for homogenization. Due to the insufficient initial fragmentation of the sample, the homogenization capacity requirement for the fully automatic homogenizer is much higher.
After the completion and installation of the AutoHG-24 plus automatic homogenizer in our company, we found that the sample with a particle size of 3-5mm was homogenized and tested. Due to the large particle size and low solvent, the sample was sampled. It can't flow effectively, so it can't be inhaled by the rotor of the full-motion homogenizer. After repeated trials, the homogeneous homogenization process is optimized, and a fully automatic homogenization method suitable for 3-5mm particle size samples is finally explored. as follows:
Instrument: AutoHG-24 plus automatic homogenizer
Solvent: acetonitrile
Sample: Carrot
Take the sample: take 10 g of the initially pulverized sample, the particle size is 3-5 mm, and place it in a 50 ml sample tube;
Set instrument parameters: solvent addition amount: 15ml; one homogenization speed 10000RPM; one homogenization time 1 minute; gap retention time 40 seconds; second stage homogenization speed 16000RPM; second stage homogenization time 1 minute; three tank cleaning time Set 50 seconds; three tank cleaning speeds are set to 10000 RPM; after a period of homogenization, the fully automatic homogenizer is suspended for 40 seconds for adding salt.
Operation: Click Yun Xingjian, AutoHG-24 plus automatic homogenizer to add 15ml solvent to the sample in order, perform homogenization, the cutter head is homogeneous in the sample tube and move up and down, swinging left and right, the action is very reasonable.
Effect: After the homogenization is finished, the sample is slurried and the cutter head is automatically cleaned.
Deep Side Fertilization Machine
Deep Side Fertilization Machine,Sounding Fertilizer Applicator,Rice Sounding Fertilizer Applicator,Paddy Field Fertilizer Applicator
Taizhou Yingtian Agricultural Machinery Manufacturing Co., Ltd. , https://www.sakuradaagc.com