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A method for the determination of tobacco phosphine residues

A phosphine and tobacco technology, applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of less literature and achieve the effects of low detection limit, wide linear range and high sensitivity

Active Publication Date: 2016-03-23
CHINA TOBACCO FUJIAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few relevant literatures, so it is urgent to study and establish relevant detection methods to realize the quantitative analysis of residual phosphine in tobacco and tobacco samples, and provide a scientific basis for the safety evaluation of cigarettes

Method used

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  • A method for the determination of tobacco phosphine residues
  • A method for the determination of tobacco phosphine residues
  • A method for the determination of tobacco phosphine residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Sample pretreatment: Weigh 0.5g of tobacco sheet and cigarette sample respectively, place them in 20mL headspace vials, seal them, and put them into a headspace sampler for sampling.

[0020] Headspace sampler conditions: furnace temperature: 36°C, sampling needle temperature: 36°C, transfer line temperature: 36°C, sample vial equilibration time: 11min, sample vial pressurization time: 2.0min, sampling time: 0.2min, pull out Needle time: 0.5 min; the headspace sampler transfer line was inserted directly into the nebulizer of the inductively coupled plasma mass spectrometer.

[0021] Inductively coupled plasma mass spectrometry detection conditions: incident power: 1350W, sampling depth: 7.8mm, plasma gas flow: 15L / min, carrier gas flow rate: 0L / min; nebulizer: Babington nebulizer, spray chamber temperature: 2℃ , sampling cone aperture: 2.0mm, intercepting cone aperture: 0.4mm, analysis mode: full quantitative, interference removal technology: Octopole Collision Cell / Rea...

Embodiment 2

[0024] Using this method to detect some tobacco samples

[0025] Weigh 1.0 sample, place it in a 20mL headspace bottle, seal it, and put it into a headspace sampler for injection.

[0026] Headspace sampler conditions: furnace temperature 40°C; sampling needle temperature 40°C; transfer line temperature 40°C; vial equilibration time 12.5 min; vial pressurization time 2.0 min; sampling time 0.2 min; needle withdrawal time 0.5 min, Connection method: Plug the headspace sampler transfer line directly into the nebulizer of the pole-coupled plasma mass spectrometer.

[0027] Pole-coupled plasma mass spectrometry detection conditions: incident power: 1500W, sampling depth: 7.8mm, plasma gas flow: 15L / min, carrier gas flow rate: 0L / min, atomizer: Babington atomizer, spray chamber temperature: 4 ℃, sampling cone aperture: 2.0mm, intercepting cone aperture: 0.4mm, analysis mode: full quantitative, interference elimination technology: Octopole collision cell / reaction cell (ORS) technol...

Embodiment 3

[0032] Using this method to detect some cigarette samples

[0033] Weigh 1.0 sample, place it in a 10mL headspace bottle, seal it, and put it into a headspace sampler for injection.

[0034] Headspace sampler conditions: furnace temperature 35°C; sampling needle temperature 35°C; transfer line temperature 40°C; vial equilibration time 12.5 min; vial pressurization time 2.0 min; sampling time 0.2 min; needle withdrawal time 0.5 min, Connection method: Plug the headspace sampler transfer line directly into the nebulizer of the pole-coupled plasma mass spectrometer.

[0035] Pole-coupled plasma mass spectrometry detection conditions: incident power: 1380W, sampling depth: 8.0mm, plasma gas flow: 15L / min, carrier gas flow rate: 0L / min, nebulizer: Babington nebulizer, spray chamber temperature: 3 ℃, sampling cone aperture: 2.0mm, intercepting cone aperture: 0.4mm, analysis mode: full quantitative, interference elimination technology: Octopole collision cell / reaction cell (ORS) tec...

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Abstract

The invention provides a method for measuring tobacco phosphine residues. The method includes sample pretreatment and detection steps; the sample pretreatment is to weigh a certain amount of sample, place it in a headspace bottle and seal it, and place it in the Headspace sampler injection; when the phosphine in the sample reaches the equilibrium between the gas phase and the matrix, the gas phase is introduced into the inductively coupled plasma mass spectrometer, and the phosphorus is determined by the octapole collision / reaction cell (ORS) technology. Hydrogen content in the sample. The method adopts the method of headspace sampling, which can not only facilitate the sampling but also avoid the harm to the experimenters; the inductively coupled plasma mass spectrometry (ICP-MS method) octopole collision / reaction cell technology can eliminate 15N16O, 14N16O1H, The interference of polynuclear ions such as 12C18O1H on the determination of trace phosphine has the characteristics of high sensitivity, low detection limit, good accuracy, and wide linear range; as a method for the determination of phosphine in tobacco and tobacco samples, it is easy to operate, accurate and fast , good selectivity and strong practical value.

Description

technical field [0001] The invention relates to a method for detecting harmful substances in tobacco and tobacco products, in particular to a method for measuring tobacco phosphine residues using a headspace sampler / inductively coupled plasma mass spectrometry technique. Background technique [0002] Tobacco beetle and tobacco leaf spot borer are two main pests in tobacco leaf warehouses, and these pests can be effectively controlled by fumigation. Phosphine is a commonly used fumigant, which has the advantages of high drug efficacy, strong penetration, low dosage, low residual toxicity in tobacco leaves, and no adverse effects on the quality and taste of fumigated tobacco leaves. become a widely used fumigant. Phosphine is a colorless gas with an unpleasant special stench. Pure phosphine has a specific gravity of 1.85 and a boiling point of -87.4°C. Slightly soluble in cold water, ethanol and ether, easily adsorbed by activated carbon, decomposed by heating, easy to oxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/62
Inventor 张建平刘秀彩黄惠贞黄朝章黄华发张鼎方梁晖吴清辉邓其馨叶仲力赵艺强苏明亮白雪平蔡国华许寒春谢卫
Owner CHINA TOBACCO FUJIAN IND
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