Collection and detection method for medium-tar-concentration cigarette sidestream smoke aerosol

A side-flow smoke and aerosol technology is applied in the preparation of test samples, measuring devices, particle size analysis, etc., which can solve the problem of not using the wind speed control of the surrounding environment of cigarettes, and achieve effective control of cigarette quality, remarkable effect, Guaranteed effect of feasibility and accuracy

Active Publication Date: 2010-09-08
CHINA TOBACCO GUANGDONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this standard has the following two main technical defects: (1) This standard uses conventional analysis smoking machines to smoke cigarettes according to GB/T 16450, but does not adopt the regulations on wind speed control of the surrounding environment of cigarettes
[0009] How to make the analysis process o...

Method used

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  • Collection and detection method for medium-tar-concentration cigarette sidestream smoke aerosol
  • Collection and detection method for medium-tar-concentration cigarette sidestream smoke aerosol
  • Collection and detection method for medium-tar-concentration cigarette sidestream smoke aerosol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Select cigarette samples to produce sidestream smoke through the smoking machine, and use the existing aerosol detector to directly connect to the outlet of the fishtail hood, and directly measure the sidestream smoke aerosol captured by the fishtail hood without dilution content. The suction power comes from the suction source device of the detector itself. Usually, the steady flow rate is 40L / min, and the gas sample is sucked outward. However, because the concentration of aerosol in the flue gas is much higher than that in the air, the detector is seriously overloaded. The detection result exceeds the detection limit of the instrument (4.0×10 5 fA), there was no difference between the detected values, and all reached the maximum value, etc., the results are as attached figure 1 As shown, the detection analysis cannot be performed. At the same time, the ambient air flow rate of the cigarette sample detection deviates from the standard requirement range of 200±30mm / s,...

Embodiment 2

[0044] The connection method of the detection gas circuit is as attached figure 2 shown.

[0045] (1) The cigarette sample generates sidestream smoke during the smoking of the smoke generating device (smoking machine), and collects the sidestream smoke by using a fishtail hood with a cross-sectional size of 10 cm in length and 2 cm in width at the lower end to form a sample airflow 1; The cross-sectional area of ​​the lower end of the fishtail cover is 20cm 2 ;

[0046] (2) The sample stream 1 is divided into two branches by the first split, one is the sample stream 3, and the sample stream 3 is split by the diluter to form the sample stream 4 for detection.

[0047] The diluter adopts an axial diluter, and the axial diluter is provided with a clean compressed air inlet and a pressure regulating valve for regulating the flow of clean compressed air.

[0048] When the flow rate of sample flow 4 is set at 10L / min, adjust the flow rate of clean compressed air to 7.5L / min and ...

Embodiment 3

[0055] Other steps and operation are identical to embodiment 2, and difference is step (2):

[0056] When the flow rate of sample stream 4 is set at 40L / min, adjust the flow rate of clean compressed air to 38L / min, and the dilution ratio of the axial diluter to 20:1, so as to realize the flow rate of sample stream 3 at 2L / min and the aerosol concentration of sample stream 3 to be 20 double dilution.

[0057] The other branch splits the sample flow 2, and adjusts the flow rate of the sample flow 2 to 22 L / min by means of auxiliary suction source 1 split suction, and the split ratio is 12:1;

[0058] After determining that the flow rate of sample flow 2 is 22L / min and the flow rate of sample flow 3 is 2L / min, the flow rate of sample flow 1 is 24L / min, so that the ambient gas flow rate is 200mm / s; and the total dilution factor is 240:1.

[0059] Aerosol detection and calculations were performed on sample stream 4.

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Abstract

The invention discloses a detection method for cigarette sidestream smoke aerosol, which is suitable for medium-tar-concentration cigarette sidestream smoke. The method comprises the following steps: the sidestream smoke of a cigarette sample is collected by a fishtail hood, is primarily diverted by an auxiliary suction source to form a sample stream 3 and is secondarily diverted by a diluter, and the inlet/outlet air amount of the diluter is regulated to realize quantitive diluting, thereby forming a sample stream 4 the flow rate of which is 10-40 L/min; and meanwhile, the sample stream 3 isregulated so as to regulate the auxiliary suction source, so that the environment air flow rate becomes 200+/-30 mm/s, thereby meeting the effective detection range of the aerosol detector and requirements of cigarette sample detection for the environment air flow standard. Thus, the invention obtains a reliable detection result for the medium-tar-concentration cigarette sidestream smoke aerosol.

Description

technical field [0001] The invention belongs to the technical field of cigarette smoke detection, and in particular relates to a method for detecting the particle size distribution of aerosol in sidestream smoke of cigarettes. The applicable cigarette products are cigarettes with a tar content of 5-15 mg per stick. Background technique [0002] Cigarette sidestream smoke refers to all the smoke that penetrates from any other part of the cigarette except the smoke that flows out from the smoking end. It is one of the important ways to generate "second-hand smoke" and is the incomplete combustion of cigarette materials. and cleavage products. Cigarettes release a large amount of sidestream smoke when burning, which contains many substances that are harmful to people's health, such as nicotine, aldehydes, etc., and the content of different chemical components on aerosol particles with different particle sizes will be different. Some The difference in composition is even greate...

Claims

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Application Information

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IPC IPC(8): G01N15/02G01N1/24G01N1/14G01N1/38
Inventor 沈光林孔浩辉
Owner CHINA TOBACCO GUANGDONG IND
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