Method for measuring hydrogen sulfide in mainstream cigarette smoke

A technology for mainstream cigarette smoke and a determination method, applied in the field of ion chromatography determination, can solve the problems of difficulty in comprehensively capturing hydrogen sulfide, inability to determine hydrogen sulfide, etc., and achieves the effects of avoiding oxidation loss, fast speed, and accurate determination method.

Active Publication Date: 2012-07-04
CHINA TOBACCO JIANGSU INDAL
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem that it is difficult to fully capture hydrogen sulfide in mainstream cigarette smoke and at the same time cannot directly measure hydrogen sulfide, and provides a method for measuring hydrogen sulfide in mainstream smoke of cigarettes, which is characterized in that: The determination method is to use the mixed solution of 10mmol / L~20mmol / L sodium hydroxide, 400mmol / L sodium acetate, 0.5% ethylenediamine and 20mmol / L~40mmol / L ascorbic acid as the trapping solution to detect the Hydrogen sulfide is captured, and after the captured solution is filtered, an anion exchange chromatography-pulse amperometric detector is used for qualitative and quantitative detection

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  • Method for measuring hydrogen sulfide in mainstream cigarette smoke
  • Method for measuring hydrogen sulfide in mainstream cigarette smoke
  • Method for measuring hydrogen sulfide in mainstream cigarette smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1 Qualitative detection method

[0042] Preparation of analysis samples: After the cigarette laboratory samples are balanced at temperature (22±2)°C and relative humidity (60±5)% for 48 hours, according to the draw resistance (average value ±50) Pa, mass (average value ±20) The parameters of mg require screening to obtain the analysis sample;

[0043] Preparation of eluent: Weigh 32.81g of anhydrous sodium acetate dissolved in 800mL of ultrapure water, filter through a 0.22μm Nylon membrane and transfer to a 1L plastic volumetric flask; then pipette 5.2mL of 50% NaOH and Put 5mL of ethylenediamine into a plastic volumetric flask, adjust the volume to 1000mL with ultrapure water, then transfer it to a polyethylene eluent bottle, and place it under 40kpa nitrogen protection to obtain 100 mmol / L sodium hydroxide , 400 mmol / L sodium acetate, 0.5% ethylenediamine eluent;

[0044] Preparation of diluent for standard solution: Weigh 0.400g of analytical pure sodiu...

Embodiment 2

[0056] Embodiment 2 Quantitative detection method

[0057] Drawing of standard curve

[0058] Samples and reagents were prepared respectively according to the method in Example 1.

[0059] Dilute the standard stock solution with the diluent of the standard solution into a concentration range of about 0.2 μg / mL to 10.0 μg / mL, and a series of standard working solutions of sulfide ions with no less than 5 gradients. To draw a standard curve, R 2 Must not be less than 0.99. The standard curve is: nC*min=0.0269C-0.8476, r=0.99928 such as Figure 4 shown.

[0060] quantitative test

[0061] Preparation of capture solution and connection of capture bottle and smoking machine: Accurately weigh 0.176g of analytically pure ascorbic acid, add it to the capture bottle, and then accurately pipette 50mL of pre-prepared capture solution, and add it to the capture bottle. At this time, the concentration of the trapping solution is: 10mmol / L-20mmol / L sodium hydroxide, 400mmol / L sodium ac...

Embodiment 3

[0073] Example 3 The methodological verification of the assay method when one is sucked

[0074] Sample preparation, reagent preparation, chromatography and detection parameters are as in Example 1 or 2.

[0075] Smoking machine preparation: Preheat and adjust the smoking machine to the standby state according to the operation method of the instrument and the requirements of GB / T 19609 standard conditions; connect the filter holder with a 44mm glass fiber filter in series to intercept the mainstream smoke particulate matter;

[0076] Standard curve drawing: Dilute the standard stock solution with the standard solution diluent into a standard working solution of sulfide ion series with a concentration range of about 0.2μg / mL ~ 10.0μg / mL and no less than 5 gradients, and immediately follow the chromatographic and Analyze the detection conditions and draw the standard curve, R 2 Not less than 0.99;

[0077] Preparation of capture solution and connection of capture bottle and s...

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Abstract

The invention relates to a method for measuring hydrogen sulfide in mainstream cigarette smoke, in particular to an ion chromatography method for measuring hydrogen sulfide in mainstream cigarette smoke. The invention provides a method for directly measuring hydrogen sulfide in mainstream cigarette smoke, in order to solve the problem that complete capture and derivatization indirect measurement of hydrogen sulfide in mainstream cigarette smoke are susceptible to interference in prior arts. In the inventive method, an alkaline solution containing ascorbic acid, zinc acetate, ethylenediamine and sodium hydroxide is adopted to capture hydrogen sulfide in the gas phase of cigarette smoke, and anion exchange chromatographic separation and silver working electrode-equipped pulsed amperometric detector are adopted to directly measure hydrogen sulfide (sulfur ions) in the mainstream cigarette smoke. Compared with a conventional method, the inventive method has simpler operation, higher safety and higher interference resistance.

Description

technical field [0001] The invention relates to a method for determining hydrogen sulfide in cigarette smoke, in particular to a method for determining ion chromatography of hydrogen sulfide in cigarette smoke. [0002] Background technique [0003] Because there are sulfur proteins and sulfur-containing amino acids in tobacco, when cigarettes are smoked, these substances will be cracked to generate a variety of sulfides, of which hydrogen sulfide is a relatively important one; in addition, considering that the temperature in the cigarette burning cone is as high as 1000 0 C and the presence of alkyl radicals, inorganic sulfates in tobacco may be another source of hydrogen sulfide in smoke. [0004] Hydrogen sulfide is the simplest compound in the -II oxidation state of sulfur, and is an important sulfide. Hydrogen sulfide is a strong neurotoxin and has a strong irritant effect on mucous membranes. Acute toxicity (LC506): 18mg / m 3 (rat inhalation). Subacute and chronic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/08
Inventor 刘献军庄亚东沈晓晨张映熊晓敏朱怀远张媛王珂清
Owner CHINA TOBACCO JIANGSU INDAL
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