Olfactory analog instrument and qualitative, quantitative and simultaneous analysis method of various gases

Abstract

The invention relates to an olfactory analog instrument and a qualitative, quantitative and simultaneous analysis method of various gases, and has the following characteristics that: firstly, the instrument comprises a test box, headspace gas generating devices, a computer and a clean air bottle; secondly, the constant temperatures of a gas sensor array workroom, a sample to be detected and a headspace volatile gas are 55+-0.1 DEG C, heating but no refrigerating is carried out in the process at constant temperature, and the volume of the headspace volatile gas is 180 milliliters; thirdly, gas headspace sampling is carried out automatically within five seconds by a micro-vacuum pump, a magnetic valve, a throttle valve, a sample injector, an automatic sample lifting device of the test box and the computer; fourthly, the hole of the sample injector is directly communicated with the air inlet hole of the gas sensor array workroom; fifthly, the qualitative, quantitative and simultaneous analysis method of various gases is realized by a structurized neural network module. The olfactory analog instrument is provided with six headspace gas generating devices capable of measuring six samples within one hour, thereby having the advantages of high automatic degree, simple and convenient operation and low test cost.

Description

technical field [0001] The present invention is an olfactory simulation instrument and a qualitative and quantitative simultaneous analysis method of multiple odors, which relate to the fields of computer, precision measurement, automatic control, precision machinery, analytical chemistry, spices and food. The invention mainly solves the problems of precise constant temperature of the working chamber of the gas sensor array, the measured sample and its headspace volatile gas, generation of large-capacity headspace volatile gas, automatic headspace sampling, simultaneous identification of multiple odors and concentration estimation. Background technique [0002] Olfactory simulation instruments are mainly used for odor identification, quantitative analysis of odor intensity and estimation of concentration of key components. [0003] A sensitive gas sensor is enough to complete the task of qualitative or even quantitative analysis of a single odor. However, a gas sensor that ...

AI Technical Summary

Problems solved by technology

However, directly cementing the 7-core ceramic socket inside the annular working chamber of the gas sensor array will result in an ineffective reduction in the volume of the circular working chamber, and removing the 7-core ceramic socket will affect the sensitivity of the gas sensor itself and the reliability of the connecting line

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