Method for detecting peculiar smell caused by acetic acid and propionic acid in tobacco sheets

A technology for tobacco sheet and acetic acid, which is applied in the field of detecting food odor, can solve the problem of no tobacco sheet acetic acid and propionic acid detection methods, etc., and achieves the effects of simple operation, simple test operation and accurate results.

CN101710106BActive Publication Date: 2012-07-04SHANGHAI TOBACCO GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-07-04

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Abstract

The invention discloses a method for detecting peculiar smell caused by acetic acid and propionic acid in tobacco sheets, which comprises the following steps: (1) weighing tobacco papermaking method sheets with standard weight as a sample for detection; (2) putting the sample to be detected into a top hollow bottle and preheating; (3) keeping the temperature of the top hollow bottle unchanged, purging substances volatilized from the sample to a collecting trap, then blowing dryly and removing water which is previously carried in the collecting trap; (4) heating the collecting trap so as to desorb the collected substances; (5) analyzing the desorbed substances by a gas phase chromatography / mass spectrum united instrument; and (6) obtaining the peak area of the characteristic peak of aceticacid by the integration of a spectrogram so as to characterize the content of the acetic acid; after extracting characteristic ion flow, obtaining the peak area of propionic acid by integration so asto characterize the content of the propionic acid. The invention has the advantages of simple, convenient, quick and accurate operation, strong versatility of instruments and the like.
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Description

technical field

[0001] The invention relates to a method for detecting the peculiar smell of food, in particular to a method for detecting the peculiar smell caused by acetic acid and propionic acid in tobacco sheets. Background technique

[0002] At present, the quality of tobacco flakes is being paid more and more attention at home and abroad. However, due to the complexity of the components of tobacco products, it is difficult to quickly and accurately determine the odor components. Monobasic acids such as acetic acid and propionic acid are volatile acids. If the content of these two substances is too high, not only the sheet itself will have an acidic odor, but also the aroma of cigarettes added with this sheet will be negatively affected during the smoking process. Therefore, It is necessary to quickly and accurately detect acetic acid and propionic acid in flakes to ensure their quality. At present, there is no specific detection method for acetic acid and propionic a...

Examples

specific Embodiment 1

[0029] Test the normal flake samples without obvious peculiar smell and some flake samples with peculiar smell. Weigh 1 g of normal flakes and place them in a headspace vial and put them into O·I·Analytical 4552 liquid / solid autosampler. Set the temperature of XFERLine and US Valve to 150°C and 120°C respectively. Preheat the sheet at 40°C for 15 minutes, then blow it to the trap for 30 minutes, dry blow for 6 minutes to remove the water blown into the trap, and then heat the trap to 250°C for 2 minutes for desorption. After desorption, the trap was baked at 260°C for 10 minutes to remove residual substances in the trap. The desorbed substances enter the PerkinElmer Clarus 600 gas chromatograph along with He gas. After temperature programming was carried out according to step (5) in the summary of the invention, the sample separated by chromatography was analyzed by PerkinElmer Clarus 600T mass spectrometer. After completion, repeat the above process for the analysis of the...

specific Embodiment 2

[0030] A certain substrate and the thin slice samples produced by using the substrate are tested. Weigh 1 g of the substrate and place it in a headspace vial and put it into an O·I·Analytical 4552 liquid / solid autosampler. Set the temperature of XFER Line and US Valve to 150°C and 120°C respectively. Preheat the sheet at 40°C for 15 minutes, then blow it to the trap for 30 minutes, dry blow for 6 minutes to remove the water blown into the trap, and then heat the trap to 250°C for 2 minutes for desorption. After desorption, the trap was baked at 260°C for 10 minutes to remove residual substances in the trap. The desorbed substances enter the PerkinElmer Clarus 600 gas chromatograph along with He gas. After temperature programming was carried out according to step (5) in the summary of the invention, the sample separated by chromatography was analyzed by PerkinElmer Clarus 600T mass spectrometer. After completion, repeat the above process for the analysis of the flake samples...