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Automatic potentiometric titration method for determining acid value of tobacco essence and flavor before and after blending

A potentiometric titration method and a technology for tobacco flavors, which are applied in the quality control of primary and secondary blending tobacco flavors, and in the field of tobacco flavors before blending, can solve the problems of low detection accuracy, time-consuming and labor-intensive, etc.

Active Publication Date: 2014-09-10
CHINA TOBACCO FUJIAN IND
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Time-consuming and labor-intensive, and the detection accuracy is not high

Method used

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  • Automatic potentiometric titration method for determining acid value of tobacco essence and flavor before and after blending
  • Automatic potentiometric titration method for determining acid value of tobacco essence and flavor before and after blending
  • Automatic potentiometric titration method for determining acid value of tobacco essence and flavor before and after blending

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Experimental program
Comparison scheme
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Embodiment Construction

[0017] 1. Titrant preparation.

[0018] According to the steps of GB / T 601-2002 "Preparation of Chemical Reagent Standard Titration Solutions", weigh 0.7-1.0 g of analytically pure KOH, add 0.5 mL of ultra-pure water to dissolve, dilute to 1 L with 95% ethanol, and seal it for 24 hours , Transfer the supernatant to another polyethylene bottle to obtain a potassium hydroxide-ethanol solution with a concentration of 0.01mol / L. The exact concentration of potassium hydroxide-ethanol solution was calibrated before each experiment.

[0019] 2. Calibration of titrant.

[0020] 2.1. Pipette 3 parts of the same volume of 65-75% ethanol (V / V), titrate to the equivalence point, obtain the volume of titrant consumed and calculate the average value And store it as an auxiliary value H2, so that it can be called at any time in subsequent calculations.

[0021] 2.2. Accurately weigh 3 parts of 0.01g potassium hydrogen phthalate reference material dried at 105°C for 2 hours, add 1mL of ul...

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Abstract

The invention discloses an automatic potentiometric titration method for determining the acid value of tobacco essence and flavor before and after blending. According to the method, a to-be-determined sample is diluted or dissolved with ethanol with a concentration of 65 to 75% (V / V), a potassium hydroxide-ethanol solution is used as a titrant, automatic potentiometric titration is employed for titration, and a titrator is used to automatically discriminate a titration end point and to calculate titration results. The method for determining the acid value of tobacco essence and flavor before and after blending is fast and precise, can accurately and rapidly detect the acid value of the to-be-determined sample, realizes quality control of tobacco essence and flavor and provides technical support for actual production.

Description

technical field [0001] The invention relates to the technical field of quality control of tobacco flavoring liquid before blending, primary blending and secondary blending. In particular, it refers to an automatic potentiometric titration method for measuring the acid value of tobacco flavor and fragrance before and after blending. Background technique [0002] Tobacco flavors and fragrances come in a variety of varieties, with complex sources, and may contain a single component or multiple components. The composition of the flavor liquid prepared by the user is even more complex. Due to the complexity of the composition, during the production, storage, transportation, and storage and application of tobacco flavors and fragrances, there may be changes in density, refractive index, acid value, and total volatile components due to temperature, humidity changes, and oxidation. Parameters such as quantity change. In order to ensure the quality of tobacco flavors and fragrances...

Claims

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Application Information

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IPC IPC(8): G01N27/42
Inventor 周培琛刘泽春张峰方钲中黄华发张廷贵刘江生
Owner CHINA TOBACCO FUJIAN IND
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