Automatic end point quantification device and method for steam distillation

Abstract

The invention relates to an automatic end point quantification device and method for steam distillation. The device comprises a base, a quantification unit and a control unit. The base is provided with a portion for containing a cut fraction receiving bottle; the quantification unit is used for monitoring the amount of cut fraction in the cut fraction receiving bottle placed on the base; the control unit can generate a signal for controlling connection and disconnection of a distillation circuit for generating cut fraction according to a signal output by the quantification unit. According to the automatic end point quantification device and method for steam distillation, based on peeling weighing, the cut fraction receiving bottle is automatically weighed for obtaining the net weight, experiment personnel do not need to conduct untimed sampling, weighing and disconnection for stopping distillation, the situation is avoided that the hidden cut fraction overflowing dangers are caused due to non-timely stopping, and the repeated complex work is reduced; according to a set value, the amount of receiving cut fraction is automatically controlled, the precision is high, and time and labor are saved.

Description

technical field [0001] The invention relates to a receiving automatic control device for a steam distillation apparatus, in particular to a steam distillation automatic endpoint quantitative device and method. Background technique [0002] Determination of the nitrogen content in foods such as milk powder requires the use of steam distillation. Hydrogenated compounds in cassava, nitrosamines in bacon, etc. also use steam distillation for sample pretreatment. The national standard stipulates that the detection of hydride in food requires distillation and condensation to collect at least 240g of steam. However, at present, domestic and foreign steam distillation lacks the method of automatic control of fraction collection. The amount of collected samples is determined by manual observation and estimation, and the output fraction is collected. After receiving the bottle and taking it out and adopting the method of manual weighing, there are the following problems: [0003] (1)...

AI Technical Summary

Problems solved by technology

[0003] (1) When the type or quantity of output fractions is large or insufficient, it will inevitably increase the repeated labor and calculation times of the operator;

[0004] (2) During the distillation process, the operator cannot leave, and the work efficiency is low;

[0005] (3) Generating too much steam needs to consume more heat energy, which is not conducive to saving electric energy

[0006] (4) Excessive fractions may overflow and damage equipment

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