Formaldehyde analysis device

Abstract

The embodiment of the present invention relates to a formaldehyde analysis device, including an extraction module, an ultrafiltration module, and a detection module, wherein the extraction module is used to extract formaldehyde from a solid sample to be tested by using the ultrasonic principle to obtain a sample solution in which the formaldehyde is dissolved; A hollow fiber ultrafiltration membrane is fixed in the filtration module; the detection module is respectively connected with the extraction module and the ultrafiltration module, and is used for detecting formaldehyde in the sample solution purified by the ultrafiltration module. Using the formaldehyde analysis device of the embodiment of the present invention, wherein the ultrasonic principle is used to extract formaldehyde, the time for extracting formaldehyde from solid samples can be greatly shortened, and the formaldehyde can be extracted uniformly and completely, and then through the hollow fiber ultrafiltration membrane. After filtering, the detection module completes the detection of formaldehyde. The organic combination of the three greatly improves the efficiency of extracting formaldehyde and purifying samples, thereby greatly improving the efficiency of detecting formaldehyde in solid samples.

Description

technical field [0001] The invention relates to a formaldehyde analysis device. Background technique [0002] At present, in various testing institutions, supermarkets or food companies, formaldehyde rapid detectors are generally used to detect formaldehyde in solid samples such as food. The rapid formaldehyde detectors are generally small single-channel or multi-channel photometers. The detection principle is Using a tungsten lamp or a light-emitting diode as a light source, using the characteristic wavelength provided by it, it is incident on the sample cell filled with the reaction solution, and the content of formaldehyde is determined according to the amount of light absorbed by the reaction solution at the characteristic wavelength. However, in order to realize the determination of the sample in the existing formaldehyde rapid detector, the solid sample must be soaked in an aqueous solution to extract formaldehyde, and the soaking time generally needs more than 30 minu...

AI Technical Summary

Problems solved by technology

However, in order to realize the determination of the sample in the existing formaldehyde rapid detector, the solid sample must first be placed in an aqueous solution to soak to extract formaldehyde. The soaking time generally needs more than 30 minutes. Like this, the extraction of formaldehyde is not complete, and the efficiency of extracting formaldehyde Greatly reduced

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