4 results about "Particulate matter sampler" patented technology

The utility model discloses an air particulate matter sampler, which relates to the field of air detection, and comprises a sampling head and a main machine, the sampling head comprises a TSP cutter, a PM cutter and a cutter base which are sequentially arranged from top to bottom; the opposite surfaces of the TSP cutter and the PM cutter are magnetically attracted and fixed through a magnetic attraction structure, and the opposite surfaces of the PM cutter and the cutter base are magnetically attracted and fixed through a magnetic attraction structure; the magnetic attraction structure comprises an upper magnetic column and a lower magnetic column which faces the upper magnetic column and can be connected in a magnetic attraction mode. Sealing rings are arranged on the upper end faces of the joints of the PM cutter and the cutter base. Rapid disassembly and assembly can be achieved through connection of the magnetic attraction structures, the magnetic attraction structures are correspondingly installed up and down during installation, connection can be achieved, and the magnetic attraction structures can be separated and disassembled only by screwing a very small angle to be staggered up and down during disassembly; and meanwhile, a sealing ring is arranged to ensure air tightness.

The application discloses a kind of efficient collection and extraction method and application of air eDNA.The method uses glass fiber filter as sampling filter, uses medium-flow particulate matter sampler and TSP sampling head to carry out sampling, uses dry ice to carry out sample preservation transportation, uses PBS buffer and low-temperature low-speed centrifugal elution DNA, uses PES filter to enrich and precipitate particulate matter, and PES filter is cut into small pieces to improve DNA extraction efficiency.The environmental DNA extracted by the application has higher concentration and good integrity, and the DNA extracted by the method can obtain good amplification results using universal primers of different species for amplification, which is convenient for subsequent eDNA macro-barcode technology to analyze species diversity.

The utility model provides an air particulate matter sampler which comprises a rotating disc assembly, the rotating disc assembly comprises a rotating disc structure and a driving structure, and the rotating disc structure is provided with a first avoiding hole, a second avoiding hole and a third avoiding hole; the driving structure is connected with the turntable structure; the sample assembly comprises a first push rod head and a first push rod structure, the first push rod head corresponds to the first avoiding hole, and the first push rod structure is connected with the first push rod head; the sampling assembly comprises a second push rod head and a second push rod structure, the second push rod head corresponds to the second avoiding hole, and the second push rod structure is connected with the second push rod head; wherein a filter membrane clamp is arranged in the third avoiding hole, the driving structure drives the turntable structure to rotate, the third avoiding hole is switched to the position of the second avoiding hole, the second push rod structure jacks up the filter membrane clamp in the third avoiding hole through the second push rod head, and the first push rod structure jacks up the filter membrane clamp in the second avoiding hole through the first push rod head. And automatic film changing can be achieved.

1. Name of the product in this design: Gas Flow Calibrator. 2. Application of this design: Used for calibrating the flow rate and pressure of sampling and gas detection instruments such as VOCs samplers, air samplers, particulate matter samplers, and smoke and dust testers. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.