Fudan University

Jianmin Chen

Xiaona Shang

Ling Li

Jianfeng Sun

Chao Zhu

Guodong Sui

Huihui Kang

Haiping Xiong

The disclosed apparatus includes a collision-type PMfilter, a resistive heating rod with a temperature sensor, a sealed water tank, a condensation system, a virtual concentrator, a flow controller, a vacuum pump, a particulate matter collection bottle, dimethylacetamide reagent, an ultrasonic bath, a fraction automatic supply/collect integrated pump, a vacuum parallel concentrator, a micro-injection pump, and a liquid chromatography-time-of-flight mass spectrometer. This apparatus can replace traditional filter sampling for collecting PMgreatly freeing up manpower, saving resources, and reducing organics loss in PM. The collected sample solution is injected into the liquid chromatography-mass spectrometer for online analysis of organic components. By introducing an enrichment system, the concentration of sample PMcan be increased at least by 10 times, enhancing the sampling capability of the apparatus. This apparatus achieves full automation of PMsampling and collection. This apparatus can be widely applied in air quality monitoring and health risk assessment.

Semi-online analytical apparatus for measuring atmospheric trace nitrogen-containing organic components

A kind of online PMconcentrated collection instrument and method are provided including five parts: PMcutting head, water tank system, virtual cropping system, condenser circulation system and online concentrated collection system. Connected with PMcutting head, a water tank system contains water tank, electrical heating rod and temperature-controlled digital display device. Virtual cropping system contains virtual cutter, concentrated air vacuum pump, and main air vacuum pump. The condenser circulation system circulating condensate condenses to grow the saturated particles, condenser circulation system contains condensate circulation tube, condensing machine. The online concentrated collection system contains biological sampling bottle, solenoid valve with relay, automatic distillate collector and computer subdivision constant-current pump. Real PMsamples could be concentrated by this instrument to 7-10 times with high efficiency which would provide technical support for the following on-line chemical component or toxicity test.

Kind of online PMconcentrated collection instrument

Growing community of inventors

Shanghai, China

Jianmin Chen