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Method for online measurement of pH of cigarette main stream smoke in real time

A technology of cigarette mainstream smoke and mainstream smoke, applied in the direction of material electrochemical variables, etc., can solve the problems of cumbersome operation and inability to fully reflect the acidity and alkalinity of smoke

Active Publication Date: 2013-08-07
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is cumbersome to operate, and the absorption liquid is selective for the absorption of flue gas components, which cannot fully reflect the acidity and alkalinity of flue gas

Method used

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  • Method for online measurement of pH of cigarette main stream smoke in real time
  • Method for online measurement of pH of cigarette main stream smoke in real time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Firstly, take a domestic brand of flue-cured tobacco cigarettes out of the box, place them in an environment of temperature: (20±2)°C, relative humidity: (60±5)% for 48 hours, and select cigarettes with acceptable weight and draw resistance . Wrap one end of the 12-18cm cotton cloth that is loose into a cotton thread on the pH electrode calibrated with a standard buffer solution. The lower end of the cotton cloth is about 1cm away from the pH electrode glass ball. The loose cotton thread just touches the glass ball. Fix the cotton thread with a rubber band. , placed in a mixed phosphate buffer solution (pH = 6.86). Connect the prepared pH electrode into the mainstream smoke channel of the smoking machine, adjust the smoking machine so that the suction volume of the smoking machine is 35mL / mouth, and the puffing curve is bell-shaped, and the balanced cigarette samples are pressed according to YC / T29- 1996 suction, read the value of the pH meter at the end of each suctio...

Embodiment 2

[0030] This example is basically the same as Example 1, except that the cigarette sample is different, which is an imported mixed type cigarette of a certain brand. The results are shown in Table 2.

[0031] Table 2. Measurement results of single-puff pH in mainstream smoke of a brand of mixed cigarettes

[0032] pH value first mouth 6.21 port 2 6.37 mouth 3 6.35 mouth 4 6.36 mouth 5 6.35 mouth 6 6.31 No. 7 6.28 No. 8 6.16

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Abstract

The invention discloses a method for online measurement of pH of cigarette main stream smoke in real time. The method is characterized by comprising the following steps: directly placing a reformed pH electrode into the smoke passage of a cigarette sucking machine; starting the cigarette sucking machine to suck the cigarette, wherein when the main stream smoke passes by the surface of the electrode, the acid and alkaline chemical substances in the main stream smoke react with a buffering solution on the pH electrode; recording the reading of a pH meter, and measuring the pH of the cigarette main stream smoke in real time. The method disclosed by the invention can be used for accurately measuring the pH of the cigarette main stream smoke and directly and comprehensively reflecting the acid and alkaline indexes of the cigarette main stream smoke, and compared with the prior art, the method has the characteristics of simple operation, high sensitivity and reliable result, and a novel method for measuring pH of cigarette main stream smoke is created.

Description

[0001] technical field [0002] The invention relates to a method which can be used to measure the pH value of cigarette mainstream smoke on-line in real time. In this method, a modified pH electrode is directly placed in the flue gas channel of the smoking machine. When the mainstream smoke passes through the electrode surface, the acid-base chemical substances in the mainstream smoke react with the buffer solution on the pH electrode, thereby real-time Measure the pH value of the mainstream smoke of the cigarette, so as to reflect the acidity and alkalinity of the mainstream smoke during the smoking process of the cigarette. [0003] Background technique [0004] Cigarette smoke is an aerosol composed of thousands of chemical substances, and various components coordinate with each other in the smoke to affect the smoking quality of cigarettes. Among them, the pH value of the smoke is one of the important factors affecting the quality of cigarettes. Only when the acidity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N27/36
Inventor 卢斌斌刘惠民谢剑平毛健孙世豪宗永立李鹏宋瑜冰张启东
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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