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Method for measuring content of HCN (hydrogen cyanide) in main stream smoke of cigarettes

A technology of cigarette mainstream smoke and measurement method, which is applied to measurement devices, instruments, scientific instruments, etc., can solve the problems of cumbersome pretreatment and detection process, large workload, complicated devices, etc., and achieve shortened test period, easy operation, short time effect

Active Publication Date: 2015-10-28
CHINA TOBACCO FUJIAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has complex devices, cumbersome pretreatment and detection processes, and a large workload.

Method used

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  • Method for measuring content of HCN (hydrogen cyanide) in main stream smoke of cigarettes
  • Method for measuring content of HCN (hydrogen cyanide) in main stream smoke of cigarettes
  • Method for measuring content of HCN (hydrogen cyanide) in main stream smoke of cigarettes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0052] 1) Reagents and instruments used

[0053] Reagents: hydrogen cyanide standard substance solution, copper sulfate, KOH, Kentucky 3R4F reference sample, ultrapure water;

[0054] Instruments: ion chromatograph (equipped with column thermostat, gradient pump, anion suppressor, KOH generator and conductivity detector), suction unit (SM450 smoking machine), balance, ultrasonic generator, pure water meter, 0.45μm water phase Filter membrane, 5mL disposable syringe, Φ44mm Cambridge filter (whatman F319-04).

[0055] 2) Preparation of filter: use pipette to remove CuSO 4 Solution (CuSO of Examples 1~3 4 The concentration and volume of the solution are shown in Table 1), the tip of the pipette is aligned with the center of the filter mat, CuSO 4 The solution is dropped into the filter at a constant vertical speed, and the filtrate diffuses from the center of the filter to the edge. After the addition, the surface of the filter is wet and slightly bluish. After drying, the surface of t...

Embodiment 4

[0081] Example 4 Determination of Recovery

[0082] Taking 3 groups of Kentucky 3R4F reference cigarettes as objects, the method of Example 1 was used to capture the hydrogen cyanide in the mainstream smoke. After the suction collection is completed, take out the Cambridge filter from the trap and put it into a 100mL conical flask, wipe the inner wall of the front cover of the trap with a quarter of the filter, and put it into the above conical flask, add 50mL 0.010mol / L KOH solution, and add low, medium, and high concentration gradient CN-solutions at the same time, ultrasonic elution for 30min, transfer the eluate to a 100mL volumetric flask, and use 0.010mol / L KOH solution to determine The volume was adjusted to the mark, and 3 sets of addition solutions of hydrogen cyanide eluent were obtained, and the detection was carried out according to the ion chromatography method established in Example 1. The results are listed in the following table as shown in Table 5. The recovery ...

Embodiment 5

[0085] Example 5 Measurement of capture rate

[0086] 1) Reagents and instruments used: same as Example 1

[0087] 2) Preparation of filter disc: same as Example 1

[0088] 3) Preparation and sampling of cigarette samples: same as Example 1

[0089] 4) The capture of hydrogen cyanide in mainstream cigarette smoke: figure 1 The device shown in the prior art for measuring the hydrogen cyanide content in mainstream smoke measures the capture rate. Such as figure 1 As shown, the balanced Cambridge filter obtained in step 3) is loaded into the trap 2 for capturing the particulate phase and gas phase hydrogen cyanide in the mainstream smoke. The trap 2 is connected to the trap 4 through the connecting pipe 3, and the trap 4 contains sodium hydroxide-ethylenediamine solution, and the sodium hydroxide-ethylenediamine solution is used to capture mainstream smoke Residual hydrogen cyanide. The trap 4 is connected to the suction unit 6 through a connecting pipe 5. Smoking cigarettes in accor...

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Abstract

The invention discloses a method for simultaneously trapping gas-phase and grain-phase HCN (hydrogen cyanide) in main stream smoke of cigarettes. According to the method, the HCN in the main stream smoke is trapped by the aid of glass fiber filters containing soluble bivalent copper salt. According to the method, a trapping device is simple, the operation method is convenient, the measurement result is accurate, and the test cycle is shortened.

Description

Technical field [0001] The invention belongs to the field of cigarette mainstream smoke detection, and specifically relates to a method for determining the hydrogen cyanide content in the cigarette mainstream smoke. Background technique [0002] Hydrogen cyanide (HCN) is one of the important environmental pollutants. Its toxic mechanism is mainly the combination of cyanide ion and ferric iron in oxidative cytochrome oxidase, which blocks the electron transfer of ferric iron during the oxidation process. It makes biological tissue cells unable to use oxygen, causing suffocation, coma, respiratory arrest, and severe death within minutes. The hydrogen cyanide in mainstream cigarette smoke mainly comes from the conversion of nitrogen-containing compounds in tobacco. Its low content is easy to be oxidized and degraded, and the composition of cigarette smoke is complex. Therefore, how to determine the content of hydrogen cyanide in mainstream cigarette smoke has been It's all challeng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/08G01N30/02
Inventor 黄朝章张建平谢卫黄华发叶仲力张鼎方邓其馨吴清辉刘泽春
Owner CHINA TOBACCO FUJIAN IND
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