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Whole smoke trapping and method for measuring pH value thereof

A technology of whole smoke and pH value, which is applied in the field of tobacco chemical analysis, can solve the problems of undiscovered public reports, etc., and achieve the effect of simple measurement method

Inactive Publication Date: 2010-08-04
YUNNAN RES INST OF TOBACCO SCI
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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] 1. Experimental part

[0027] 1. Instruments and reagents

[0028] Beckman Φ200 pH meter (Germany); standard 20-hole smoking machine (R20, Borgwaldttechnick, Germany); constant temperature and humidity chamber (KBF240, Binder, Germany).

[0029] Anhydrous calcium chloride, sodium dihydrogen phosphate dihydrate, sodium chloride, urea, potassium chloride, sodium hydroxide, all of which are of analytical grade; ultrapure water; 35 kinds of domestic brand cigarettes (commercially available).

[0030] 2. Preparation of artificial saliva

[0031] Artificial saliva adopts the formula commonly used in stomatology research, according to ISO / TR10271 [11-12] Standard preparation, that is, NaCl 0.4g, KCl 0.4g, CaCl 2 2H 2 O 0.795g, NaH 2 PO 4 2H 2 O 0.78g, Na 2 S·9H 2 O 0.005g and urea 1g were dissolved in 1000mL distilled water, pH value 6.8±0.05. (The use tim...

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Abstract

The invention relates to a whole smoke trapping and a method for measuring pH value thereof, belonging to the technical field of tobacco chemical analysis. The method for measuring trapped whole smoke and saliva absorption liquid pH value thereof comprises: 20 cigarettes to be measured are loaded on a smoking machine and are smoked under the standard smoking condition; two collision catchers which are respectively filled with 50 mL of artificial saliva are connected in series to adsorb whole smoke; a holder provided with a Cambridge filter is connected behind the catchers to adsorb residual particulate matters; after a cigarette is completely smoked, the filter is put into a 150 mL conical flask with a plug; trapping liquid in two stages of catchers is poured into the conical flask with the plug and mixed and covered by the plug; then, the conical flask is vibrated for 30 min on a percussion table; and the pH value of mixed liquid is measured with a precise acidometer to serve as the pH value of the mainstream smoke absorption liquid of cigarette. The invention has the advantages that whole smoke containing gas phase matter and liquid phase matter is trapped and adsorbed; and artificial saliva trapping can effectively simulate cigarette smoking practical situation. The measuring method is simple and accurate.

Description

Technical field: [0001] The invention relates to a method for capturing whole smoke and measuring its pH value, and belongs to the technical field of tobacco chemical analysis. Background technique: [0002] Cigarette smoke is an aerosol composed of many acidic, alkaline and neutral substances. Over the years, many tobacco chemists at home and abroad have realized that the pH value of cigarette smoke can comprehensively reflect the chemical balance of cigarette smoke composition, and is an important parameter for evaluating the quality and safety of cigarette smoking. Attention of the majority of tobacco science and technology workers [1-7] . In the 1960s, the pH meter was used for measurement, and then various measurement methods such as the electrode method appeared. [2] . Due to the complex composition of cigarette smoke and the many reactions involved in the smoking process, there is still no uniform definition and measurement method. At present, the methods for mea...

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Application Information

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IPC IPC(8): G01N1/24G01N27/26
Inventor 李雪梅曾晓鹰崔杨杨叶昆者为段焰青耿永勤王明峰
Owner YUNNAN RES INST OF TOBACCO SCI
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