An online and offline detection device and detection method for extracting volatile organic compounds in water by ultrasonic atomization

Abstract

The invention proposes an on-line and off-line detection device and detection method for ultrasonic atomization extraction of volatile organic compounds in water, including an online sample inlet, an off-line sample inlet, a spray cylinder, a heating constant temperature kit, a volatile organic compound detection device, an upper micro Hole ultrasonic atomizing sheet and lower microporous ultrasonic atomizing sheet; the online sample inlet includes a liquid sampling interface and a liquid sample outlet interface; the spray tube includes a carrier gas inlet and a carrier gas outlet; the upper micropore The ultrasonic atomization sheet is sealed and pressed between the off-line sample inlet and the spray tube; the lower microporous ultrasonic atomization sheet is sealed and pressed between the online sample inlet and the spray tube; the heating thermostat kit is wrapped around the spray tube; The carrier gas outlet of the spray tube is connected with a volatile organic compound detection device. The invention can realize ultra-high-efficiency extraction and on-line and off-line detection of volatile organic compounds in trace water samples.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and in particular relates to an on-line and off-line detection device and a detection method for extracting volatile organic compounds in water by ultrasonic atomization. Background technique [0002] Volatile organic compounds are a large class of important pollutants in water bodies, which are persistent, mobile, and carcinogenic, teratogenic, and mutagenic. Therefore, online detection of volatile organic compounds in water bodies is particularly important in the field of environmental protection. In addition, The online detection of volatile organic compounds in water is also of great significance in the fields of biomedical research and chemical preparation such as body fluid metabolism analysis and cell culture process analysis. [0003] At present, the extraction methods of volatile organic compounds in water include solid-phase extraction, solid-phase microextraction, liquid-liquid ex...

AI Technical Summary

Problems solved by technology

However, this invention patent is only suitable for online detection and analysis of small or large samples, not suitable for online and offline detection and analysis of micro samples

In addition, the pressurized spray in this invention patent does not use atomizing gas to assist atomization, which avoids the dilution effect of atomizing gas on organic matter, but the atomization effect of direct pressurized atomization needs to be improved, and the extraction efficiency and response to organic matter time has some influence

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