Infrared analysis aerosol sample cell

Abstract

The invention relates to an infrared analysis aerosol sample cell which comprises a sample cavity, a top cover, three sealing plugs, a fan and two ring-shaped pressing plates. The sample cavity has a U-shaped structure with an outward flanging top edge and the two ends of the sample cavity are provided with flat plates with round holes in the center; the top cover is connected with the top edge of the sample cavity, a flexible sealing washer is arranged at the joint of the top cover and the top edge of the sample cavity, and three through holes are arranged on the top cover along a longitudinal axis at equal intervals; each sealing plug is in a round table shape with height slightly larger than the thickness of the top cover and a median diameter equal to the diameter of each through hole, and one of the three sealing plugs is provided with a lead hole; and the fan is fixed in the center of the bottom of the top cover and the lead of the fan is led out through the lead hole of the sealing plug; the two ring-shaped pressing plates can be fixed at positions corresponding to the round holes at the two ends of the sample cavity and used for fixing round infrared glass or infrared film materials, which have slightly larger diameters, outside of the positions corresponding to the round holes at the two ends of the sample cell. The invention has the advantages of large volume, long optical path, convenient sample feeding, easy cleaning and infrared widow sheet replacement, good sealing performance and the like.

Description

【Technical field】 [0001] The invention relates to an aerosol sample cell for infrared analysis, belonging to the technical field of instrument analysis and optical detection. 【Background technique】 [0002] Infrared analysis plays an important role in modern analysis and detection technology, among which infrared spectrometer is the most commonly used and most representative instrument. The infrared spectrometer is mainly used for infrared tablet analysis, and the object of analysis is mainly solid samples. Infrared spectrometers can also perform liquid film analysis. The thickness of the liquid film is less than 1 mm, and the sample volume is very limited. Some infrared spectrometers have the function of analyzing gas samples, but most gas sample cells are not only expensive, but the amount of samples that can be analyzed is small, and can only analyze pure gas samples, which cannot satisfy aerosol samples composed of solid powder or ultrafine powder. Infrared detection n...

AI Technical Summary

Problems solved by technology

Some infrared spectrometers have the function of analyzing gas samples, but most gas sample cells are not only expensive, but the amount of samples that can be analyzed is small, and can only analyze pure gas samples, which cannot meet the requirements of aerosol samples composed of solid powder or ultrafine powder. The need for infrared detection

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