Distillation reflux instrument for detecting volatile matters in food and sample pretreatment method

Abstract

The invention discloses a distillation reflux instrument for detecting volatile matters in food and a sample pretreatment method, and the distillation reflux instrument comprises: a distillation unit which is used for distilling a to-be-treated sample; a heating unit used for providing water vapor for the distillation unit so as to heat the to-be-treated sample; an end point quantification unit for monitoring the amount of fraction produced by the distillation unit; and a control unit used for controlling the on-off of circuits of the distillation unit and the heating unit according to a signal output by the end point quantification unit. The instrument has the advantages of water resource saving, is simple and reliable in test operation, high in automation degree and good in man-machine interaction, can effectively improve the detection efficiency and the detection precision, is suitable for determination of the contents of nitrosamine, cyanide, volatile phenol and the like in organic matters, and has the advantages of novel idea, good safety, sample pollution prevention and high reflux efficiency.

Description

Technical field [0001] The invention relates to the technical field of detection of volatile substances in foods, and specifically refers to a distillation reflux instrument used for detection of volatiles in foods and a sample pretreatment method. Background technique [0002] Simultaneously carry out essential oils and volatile phenols from orange peel, extract camphor wood essence from the fermentation products of Antrodia camphorata, and analyze and detect volatile N-nitrosamines, cyanides and volatile phenols in food. Steam distillation is An important method to extract volatile substances. The water vapor is continuously passed into the sample container, and the effective components are evaporated with the water vapor to achieve the purpose of separating and purifying the effective components. The water vapor carried after distillation carries a large amount of volatile substances, which enter the refluxer after condensation. Methods such as spectrophotometric titration an...

AI Technical Summary

Problems solved by technology

[0003] According to the technical standards for the detection of nitrosamines and cyanides in food in my country, the conventional distillation technology and reflux process, the gasification efficiency of the material is low, the temperature of the distillate is uncontrollable, the energy consumption is huge during the continuous heating and cooling process, and there are many manual operations. Poor repeatability, not suitable for batch, continuous and efficient volatile detection and analysis, reducing energy consumption, improving efficiency, and achieving consistency of test results, is a key technical bottleneck in the field of food safety testing

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