Determination method for experiment of simulating cigarette burning for generating hydrogen cyanide

A method for measuring hydrogen cyanide, which is applied in the field of tobacco industry, can solve problems such as slow heating rate, small sample loading capacity of instruments and devices, and single carrier gas atmosphere, and achieve fast heating rate, large sample loading capacity, and experimental repeatability Good results

Inactive Publication Date: 2014-03-05
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the cracking instrument-GC-MS combined instrument or cigarette addition experiment is commonly used to study the formation of HCN from tobacco pyrolysis. In the past, commercial instruments and equipment were often used to study the formation of HCN in smoke, or the instrument device had a small sample capacity, a single carrier gas atmosphere, and a low flow rate. Small, or the heating rate is slow, which cannot accurately simulate the smoking process of cigarettes
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  • Determination method for experiment of simulating cigarette burning for generating hydrogen cyanide

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Experimental program
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Example Embodiment

[0015] Example 1

[0016] Weigh 0.1g flue-cured tobacco shreds into the middle of the quartz tube, seal both ends of the sample with 0.1g glass fiber, then put the quartz tube into the infrared furnace, insert the thermocouple into the sample in the sample tube, and set the heating program to 50℃ / s, pass in a mixed gas (20% oxygen) with a flow rate of 17.5mL / s, turn on the power, and raise the temperature from room temperature to 900°C. The exhaust end uses a Cambridge filter to capture the flue gas particulate matter, and the gas phase is passed through 20mL0 .1mol / L sodium hydroxide solution is absorbed, the Cambridge filter that traps the particulate matter is then shaken and extracted with 20mL 0.1mol / L sodium hydroxide solution for 30 minutes, and then 5mL of each solution is taken and continuously flowed in YC / T 253-2008 The amount of HCN produced by the method was measured, and the amount of HCN produced by simulated burning of 0.1g flue-cured tobacco shreds was 308μg.

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Example Embodiment

[0018] Example 2

[0019] In order to study the HCN precursor components in cut tobacco, experiments are often carried out by simulating the chemical components of the tobacco cut (such as protein, cellulose, amino acids, etc.). Weigh 100mg of protein into the middle of the quartz tube, seal both ends of the sample with 0.1g glass fiber, then put the quartz tube in the infrared furnace, insert the thermocouple into the sample in the sample tube, and set the heating program to 100℃ / s , Pass in a mixed gas (9% oxygen) with a flow rate of 17.5mL / s, turn on the power supply, raise the temperature from room temperature to 900℃, and use a Cambridge filter to capture the flue gas particles at the gas outlet. / L sodium hydroxide solution absorbs, the Cambridge filter that captures the particulate matter is then shaken and extracted with 20mL 0.1mol / L sodium hydroxide solution for 30 minutes, and then 5mL of each solution is taken and measured by the continuous flow method in YC / T 253-20...

Example Embodiment

[0021] Example 3

[0022] Weigh 0.5g glycine into the middle of the quartz tube, seal both ends of the sample with 0.1g glass fiber, then put the quartz tube in the infrared furnace, insert the thermocouple into the sample in the sample tube, and set the heating program to 100℃ / s, pass in nitrogen with a flow rate of 17.5mL / s, turn on the power supply, raise the temperature from room temperature to 900℃, use a Cambridge filter to capture the flue gas particles at the outlet end, and pass the gas phase part through 20mL0.1mol / L sodium hydroxide The solution is absorbed, and the Cambridge filter which captures the particulate matter is then shaken and extracted with 20 mL 0.1 mol / L sodium hydroxide solution for 30 minutes, and then 5 mL of the solution is taken from each, and the HCN production is measured by the continuous flow method in YC / T 253-2008. The amount of HCN produced by simulated burning of 0.5g flue-cured tobacco shreds is 17.25mg, which indicates that HCN is produ...

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Abstract

The invention discloses a determination method for an experiment of simulating cigarette burning for generating hydrogen cyanide. The determination method is characterized by comprising the steps of trapping hydrogen cyanide in pyrolysis products by using a Cambridge filter and absorption liquid by adopting a rapid heating control device and taking a nitrogen-oxygen mixed gas or nitrogen as a carrier gas, and then determining the HCN (hydrogen cyanide) content in the Cambridge filter and the absorption liquid by using an ion chromatography so as to realize the simulation of the cigarette burning for generating the HCN and quantitative analysis. Compared with previous methods of simulating the cigarette burning for generating the HCN, the determination method has the advantages of being large in sample loading capacity, capable of using the oxygen-nitrogen mixed gas with different ratios, high in heating rate, good in experimental repeatability and the like, without preparing experimental cigarettes, and can be applicable to the research on the rapid determination of HCN precursors in smoke.

Description

[0001] Technical field [0002] The present invention involves the field of tobacco industry technology. Specifically, it involves an experimental measurement method of simulated cigarette burning.This method uses a fast heating control device, a nitrogen oxygen mixed gas or nitrogen as the load, the hydrogen cyanide in the cracked and cracking of the Cambridge filter and absorption liquid, and then use the continuous flow method to determine the HCN in the Cambridge filter and absorbing solution in HCN in the Cambridge filter and absorption solutionThe content of simulation cigarette burning can produce HCN and its quantitative analysis. [0003] Background technique [0004] In view of the harm of harmful ingredients in smoke gas to the human body, reducing harmful ingredients in flue gas is a hot spot in the field of research in the tobacco industry.Hydrogen cyanide is one of the seven representative harmful components of the mainstream smoke gas. To reduce the amount of HCN r...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 王洪波夏巧玲郭吉兆郭军伟曹得坡刘克建赵阁谢复炜刘惠民
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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