A method for detecting selenium content in mainstream cigarette smoke
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A technology for mainstream cigarette smoke and detection methods, applied in the field of chemical analysis and detection, can solve problems such as lack of accuracy and reliability
Active Publication Date: 2018-09-07
SHANGHAI TOBACCO GRP CO LTD
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[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a detection method for the content of selenium in the mainstream smoke of cigarettes, which is used to solve the lack of accurate, reliable, direct and simple pretreatment in the prior art to capture the selenium content of cigarettes. Gas-phase components selenium and total selenium in mainstream smoke and methods for analyzing their content
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Embodiment 1
[0097] 1. Measurement method
[0098] 1.1 Preparation of capture solution
[0099] Add a certain amount of 65% concentrated nitric acid and 35% concentrated hydrochloric acid to absolute ethanol to prepare an acidified ethanol solution containing 1-5% nitric acid and 1-3% hydrochloric acid, preferably 3% nitric acid and 2% hydrochloric acid The acidified ethanol solution can be stored at room temperature for a long time.
[0100] 1.2 Preparation of standard solution
[0101] Pipette the selenium element, dilute and constant volume with the acidified ethanol solution prepared in 1.1, and prepare the selenium element standard stock solution. The mass concentration of the selenium element standard stock solution is 1000.0 μg / L. Storage conditions: It can be stored for 1 month at 0-4°C.
[0102] Pipette germanium 72 Dilute the standard substance solution with the acidified ethanol solution prepared in 1.1 to prepare the internal standard solution. The concentration of the in...
Embodiment 2
[0140] 1. Measurement method
[0141] 1.1 Preparation of capture solution
[0142] With the related content of 1.1 in embodiment 1.
[0143] 1.2 Preparation of standard solution
[0144] With the related content of 1.2 in embodiment 1.
[0145] 1.3 Sample capture
[0146]Select cigarettes according to the national standard GB / T5606.1-2004 "Cigarette Part 1: Sampling", and use RM- A 20H rotary smoking machine was used for balancing and smoking, and the acidified ethanol solution prepared in 1.1 was used to capture the gas-phase component selenium sample solution in mainstream cigarette smoke. The sample capture amount is the gas phase composition of 20 cigarettes each time.
[0147] The acidified ethanol solution prepared in 1.1 was used to capture selenium, the gas phase component in mainstream cigarette smoke, and two traps were connected in series, each trap was 50ml and filled with a certain amount of trapping liquid. After the capture is completed, transfer to a 50ml...
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Abstract
The invention provides a method for detecting the content of selenium in the mainstream smoke of cigarettes, which adopts an electrostatic capture method to capture selenium, the total particle phase component in the mainstream smoke of cigarettes, and simultaneously uses an acidified ethanol solution to capture the gas phase components in the mainstream smoke of cigarettes. Selenium, and the content of selenium in mainstream cigarette smoke was determined by inductively coupled plasma mass spectrometry. The invention also provides a method for detecting the content of selenium element in gas phase components in mainstream smoke of cigarettes and its application. The method for detecting the content of selenium in the mainstream smoke of cigarettes according to the present invention has good reproducibility and recovery rate, and is beneficial for relevant technicians in the tobacco industry to effectively quantitatively measure and control the content of selenium in the mainstream smoke of cigarettes, and also Provide strong technical support for the tobacco industry to comprehensively and objectively evaluate the harmfulness of selenium in mainstream cigarette smoke.
Description
technical field [0001] The invention belongs to the technical field of chemical analysis and detection, and in particular relates to a method for detecting the content of selenium element in mainstream smoke of cigarettes. Background technique [0002] Selenium is a heavy metal element, which has been widely concerned and studied in recent years because of its great harm to the human body. Selenium in cigarette smoke is one of the sources of selenium in the environment, and it is also one of the harmful components in the Hoffmann list in the tobacco industry, which includes total particle phase components and gas phase components. When smoking cigarettes, selenium will be inhaled into the bronchi, which will cause harm to the brain, lungs, liver and other organs of the human body. Therefore, in order to more comprehensively and objectively evaluate the harmfulness of selenium in cigarette smoke, we need to conduct in-depth research on the determination of selenium content i...
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