On-line detection device and detection method for atomizing extraction for volatile organic matters in water

Abstract

The invention relates to an on-line detection device and a detection method for atomizing extraction for volatile organic matters in water. The on-line detection device comprises a peristaltic pump, a sample injection capillary tube, an atomizing chamber, a volatile organic matter on-line detection mass spectrum, a constant temperature cavity, a to-be-tested liquid interface, a carrier gas interface, an atomizing needle, a gas detection port and a waste liquid draining port, wherein the sample injection capillary tube, the atomizing chamber, the to-be-tested liquid interface and the atomizing needle are located in the constant temperature cavity; the atomizing chamber is communicated with the to-be-tested liquid interface, the carrier gas interface, the atomizing needle, the gas detection port and the waste liquid draining port; the to-be-tested liquid interface is located on the left side of the atomizing chamber; the atomizing needle is located on the atomizing chamber; one end of the atomizing needle is connected with the to-be-tested liquid interface while the other end of the atomizing needle is hung in the atomizing chamber; the carrier gas interface is located on the left side above the atomizing chamber; the waste liquid draining port is located on the right side under the atomizing chamber; the gas detection port is located on the right side above the atomizing chamber; the sample injection capillary tube is connected with the to-be-tested liquid interface; the peristaltic pump is connected with the sample injection capillary tube; and the volatile organic matter on-line detection mass spectrum is connected with the gas detection port. By using the on-line detection device provided by the invention, the efficient extraction for the volatile organic matters in water can be realized and the on-line high-sensitive detection can also be realized.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and in particular relates to an online detection device and a detection method for spray extraction of volatile organic compounds in water. 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 is particularly important in the field of environmental protection. In addition, water The online detection of volatile organic compounds 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 extraction, headspace technology (including...

AI Technical Summary

Problems solved by technology

Among them, the first four organic compound extraction methods are offline enrichment sampling methods, which do not meet the needs of online detection. Although the latter three methods can extract volatile organic compounds online, the membrane sampling method not only has low sensitivity and slow response speed, but also causes crossover due to memory effects. Pollution, the dynamic gas extraction method requires a large amount of sample, and the direct liquid sampling method uses the heated carrier gas to purge and vaporize the liquid to be measured, and the large amount of carrier gas introduced has a diluting effect on the target organic matter

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