Multi-channel Ultrasonic Cell Pulverizer For Processing Soil Organic Samples

Multi-channel ultrasonic cell pulverizer for processing soil organic samples

The full frequency of ultrasound refers to 10-4~1014Hz, of which 20Hz and below are called infrasound waves, 20~20000Hz are sound waves that can be received by the human ear, and ultrasound refers to sound waves with a frequency above 20kHz. Ultrasound has the advantages of high energy flow density, good directionality, and strong penetrating power.

 Ultrasonic Features After entering the 21st century, ultrasonic extraction and separation technology has been widely used in various fields such as medicine, food, oil, chemical industry, and environmental testing, among which it plays an important role in the field of environmental testing. In April 2018, the Ministry of Environmental Protection of the People's Republic of China officially released "HJ911-2017 Ultrasonic Extraction Method for the Extraction of Soil and Sediment Organic Matter", officially including ultrasonic waves in the relevant standards for soil sample processing, and using ultrasonic waves to extract semi-volatile organic compounds and petroleum in soil Certain substances such as hydrocarbons.

 Principle of ultrasonic extraction The use of ultrasonic waves has cavitation, mechanical and thermal effects, and can also produce many secondary effects such as emulsification, diffusion, crushing, and chemical effects. It can dissolve and diffuse the active ingredients, shorten the extraction time, and improve the extraction rate of active ingredients or target substances.

Ultrasonic extraction features Improve the recovery rate of the extracted components, shorten the extraction time, do not need to heat during the extraction process, save energy, extract at low temperature, and it is not easy to change the molecular structure of the extracted components The operation is convenient, the process is simple, the use of extraction solvent is reduced, and the cost is saved Improve the cumbersome traditional extraction process, improve the economic benefits of enterprises Ultrasonic extraction of soil samples In the process of environmental testing, the soil samples can be extracted by ultrasound to extract specific analytes, such as semi-volatile organic compounds and petroleum hydrocarbons, but the samples need to be pre-prepared before they can enter the extraction process. First of all, soil samples collected from the field often contain debris such as stones, roots, glass, scrap metal, etc. The debris should be removed first, then mixed well, and roughly divided according to the quartering method.

　　Finally, the sample is homogenized. In order to ensure that the sample is fully mixed, the dried sample is ground, sieved, and homogenized to ensure the uniformity of the sample and the repeatability of the results. Ultrasonic extraction is controlled by the Xinzhi low-temperature cooling circulating pump. The Xinzhi multi-channel ultrasonic mill can complete the extraction process of multiple samples at one time within 3-10 minutes, which is efficient and convenient, and greatly reduces labor and material costs.