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Method for collecting and detecting aerosol in side-stream smoke applicable to cigarettes having different concentrations of tar

A sidestream smoke and detection method technology, applied in the preparation of test samples, measuring devices, particle size analysis, etc., can solve the problems of complex changes in the ambient air flow at the collection end, no detection system, and inability to meet the detection results. Sensitive and reliable, saving financial and material resources, reasonable pipeline setting effect

Active Publication Date: 2010-12-22
CHINA TOBACCO GUANGDONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for efficient use of a device called a smoking detectors when measuring harmful substances like carbon monoxide or nicotine on cigarets without being affected negatively affect their quality. It achieves these benefits because it combines multiple components into one unit, allowing users to measure various factors such as burning speed, amount of fuel injected during puffs, etc., at once. By selecting specific models based upon work efficacy, which ranges between 36% and 70%, the technical effect will improve accuracy and reduce costs associated therewith.

Problems solved by technology

The present technology described relating to improving the performance of analyzing cigacco sidetaxle smoke involves accurately identifying specific types of harmful substances within a given space called a “cold box” where cigarettes come from outside without being burnt due to their combustion products. By comparing the measurements taken after exposure to the exhaust gases produced by burning cigarebutts containing various compounds like nitrogen oxides, the presence of these harmful constituents may differ between levels based upon factors like temperature and humidity. A new approach is needed to address both issues related to the current methods of detecting low-tobacuty atomized nonvolatile residual carbon monoxysulfonate (SAM).

Method used

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  • Method for collecting and detecting aerosol in side-stream smoke applicable to cigarettes having different concentrations of tar
  • Method for collecting and detecting aerosol in side-stream smoke applicable to cigarettes having different concentrations of tar
  • Method for collecting and detecting aerosol in side-stream smoke applicable to cigarettes having different concentrations of tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Detection of high tar concentration cigarette sidestream smoke in this system.

[0046] (1) Cigarette samples with a tar content of 24 mg / stick (high concentration) are sucked in a smoke generating device, and the generated sidestream smoke has a cross-sectional area of ​​10 cm × 2 cm = 20 cm 2 The fish tail hoods are collected to form a sample flow 1;

[0047] (2) The sample flow 1 is divided into two branches by the bifurcated pipeline, and one branch is connected to the auxiliary suction source 1 for the first-stage split flow to form the sample flow 2. The flow rate of the sample flow 2 is adjusted to 22L / min.

[0048] (3) Another branch of sample flow 1 forms sample flow 3, which forms sample flow 4 after passing through the gas mixing diluter. The diluter is also connected with a clean compressed air source and an exhaust device connected to a pressure regulating valve. The intake flow rate of the clean compressed air of the mixing diluter is 60L / min, and the e...

Embodiment 2

[0053] Detection of low tar concentration cigarette sidestream smoke in this system.

[0054] (1) Cigarette samples with a tar content of 2 mg / stick (low concentration) are smoked in a smoke generating device, and the generated sidestream smoke has a cross-sectional area of ​​10 cm × 2 cm = 20 cm 2 The fish tail hoods are collected to form a sample flow 1;

[0055] (2) The sample flow 1 is divided into two branches by the bifurcated pipeline, and one branch is connected to the auxiliary suction source 1 for the first-stage split flow to form the sample flow 2. The flow rate of the sample flow 2 is adjusted to 20L / min.

[0056] (3) Another branch of sample flow 1 forms sample flow 3, which forms sample flow 4 after passing through the gas mixing diluter. The diluter is also connected with a clean compressed air source and an exhaust device connected to a pressure regulating valve. The intake flow rate of the clean compressed air of the mixing diluter is 8L / min, and the exhau...

Embodiment 3

[0060] The cigarette sidestream captured by the fishtail hood is directly detected:

[0061] A cigarette sample with a tar content of 24 mg / stick is smoked in a smoke generating device, and the resulting side The flue gas is collected with a fishtail hood to form a sample flow, which is detected by an aerosol detector with a working efficiency of 10L / min.

[0062] At this time, the ambient air flow rate of the cigarette sample test was 85mm / s, which did not meet the requirements of the cigarette test standard. At the same time, the aerosol test results are attached Figure 5 As shown, the detection results of aerosol particles with several diameters exceeded the detection limit of the instrument (4.0×10 5 fA), if there is no difference between the detected values, the detection and analysis cannot be carried out.

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Abstract

The invention discloses a method for collecting and detecting aerosol in side-stream smoke, which is applicable to cigarettes having different concentrations of tar. The method comprises the following steps: organically combining with a mixing and diluting device to greatly extend the range of the system in diluting the smoke, particularly extend the range of dilution to 3.6:1-600:1; and organically setting the multistage diversions and multi-layer parameters of the system to lead the system to simultaneously meet the standard requirements that the tail-end flow rate of a sample reaches 10L/min-40L/min and the front-end ambient air velocity reaches 170mm/s-230mm/s in the detection of the side-stream smoke of the cigarettes having different concentrations of tar and ensure that the detection result is reliable and sensitive. Therefore, the method of the invention is suitable for the detection of cigarette samples with the tar content span ranging from 0.5mg to 80mg per cigarette and achieves the detection of the aerosol in the side-stream smoke of various types of cigarettes by the same system for the first time.

Description

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Claims

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Application Information

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Owner CHINA TOBACCO GUANGDONG IND
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