Method for determining total sulfur dioxide in tobacco or tobacco products by using continuous flow method

A technology for total sulfur dioxide and tobacco products, applied in the field of tobacco, can solve the problems of cumbersome operation, time-consuming and labor-intensive, poor accuracy, etc.

Pending Publication Date: 2020-07-07
CHINA TOBACCO GUIZHOU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a method for measuring total sulfur dioxide in tobacco or tobacco products by continuous flow method, t...

Method used

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  • Method for determining total sulfur dioxide in tobacco or tobacco products by using continuous flow method
  • Method for determining total sulfur dioxide in tobacco or tobacco products by using continuous flow method
  • Method for determining total sulfur dioxide in tobacco or tobacco products by using continuous flow method

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Embodiment 1

[0076] Please refer to figure 1 , the embodiment of the present invention provides a kind of method for measuring the total sulfur dioxide in the tobacco leaf sample by continuous flow method, comprising the following steps:

[0077] Moisture was determined by the oven method (YC / T 31), and the total sulfur dioxide content of different tobacco leaf samples was determined by continuous flow analysis.

[0078] 1) Sample pretreatment:

[0079] Tobacco leaf samples were ground and passed through a 0.45 mm sieve (40 mesh), and their moisture content was determined. Accurately weigh 5 g of tobacco leaf samples (accurate to 0.1 mg), place them in a 100 mL conical flask, and add 100 ml of 0.01 mol / L sodium hydroxide solution. Cover with a stopper, extract by mechanical shaking at room temperature for 0.5 h, after standing still, filter the extract with Whatman No.40 filter paper, and collect the filtrate in the sample cup.

[0080] 2) Preparation of reaction reagents:

[0081] The...

Embodiment 2

[0111] Embodiments of the present invention provide a method for determining total sulfur dioxide in cut tobacco samples of finished cigarettes by continuous flow method, comprising the following steps:

[0112] 1) Sample pretreatment:

[0113] The shredded tobacco in the finished cigarette sample was ground and passed through a 0.45mm sieve (40 mesh) to determine its moisture content. Accurately weigh 5 g of the sample (accurate to 0.1 mg), place it in a 100 mL Erlenmeyer flask, and add 100 ml of 0.01 mol / L sodium hydroxide solution. Cover with a stopper, extract by mechanical shaking at room temperature for 0.5 h, after standing still, filter the extract with Whatman No. 40 filter paper, collect the filtrate in the sample cup for analysis.

[0114] 2) The preparation of reaction reagent and working standard solution is the same as in Example 1.

[0115] 3) Determination of actual samples:

[0116] Continuous flow analysis, and the determination method and standard curve o...

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Abstract

The invention relates to the technical field of tobaccos, in particular to a method for determining total sulfur dioxide in tobaccos or tobacco products by using a continuous flow method. The detection method comprises the following steps: reacting distillate of tobacco or a tobacco product, formaldehyde and basic fuchsin to generate a complex, measuring the absorbance of the complex at 550 nm, and calculating the concentration of total sulfur dioxide in the extraction filtrate of the tobacco or the tobacco product through a predetermined standard curve. The determination method provided by the invention can improve the accuracy and detection efficiency of detecting the concentration of total sulfur dioxide in tobacco or tobacco products and reduce the determination cost.

Description

technical field [0001] The invention relates to the technical field of tobacco, in particular to a method for measuring total sulfur dioxide in tobacco or tobacco products by a continuous flow method. Background technique [0002] Tobacco chemistry research has carried out qualitative analysis on thousands of compounds in tobacco leaves and smoke, and there are more and more requirements for quantitative analysis of chemical components in tobacco and tobacco products, including the update and improvement of analytical methods , the improvement of analysis efficiency, and the gradual modernization of analysis methods. This is an important basic work for the stability and development of cigarettes. The chemical composition of tobacco or tobacco products has a great influence on the quality of tobacco leaves and the sensory quality of cigarettes. At present, the quantitative analysis of conventional chemical indicators in tobacco or tobacco products includes total sugar, redu...

Claims

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Application Information

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IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 叶冲赵杨毛寒冰刘科乾刘娜
Owner CHINA TOBACCO GUIZHOU IND
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