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38 results about "Nicotine concentration" patented technology

A 30ml bottle with a nicotine concentration of 12mg/ml will therefore contain a total of 360mg of nicotine (30ml x 12mg/ml). If 1ml of e-liquid is equal to about 20 drops, then there is about 0.6 mg of nicotine in each drop (12mg/ml ÷ 20 drops).

Method for detecting nicotine based on fluorescence resonance energy transfer

The invention discloses a method for detecting nicotine based on fluorescence resonance energy transfer. The method comprises the following steps: (1) fitting of a regression equation: adding a water-soluble metal quantum dot solution and a water-soluble carbon quantum dot solution having certain concentrations and volumes into several nicotine standard solutions having different concentrations, diluting to a certain volume with a weak acid solution, and then respectively measuring fluorescence intensities F and F0 to obtain a regression equation of a relationship between (F-F0)/F0 and a nicotine concentration, wherein F and F0 are respectively the fluorescence intensities of metal quantum dots in the presence and absence of nicotine; (2) sample measurement: measuring F and F0 of a nicotine solution having unknown concentration, and substituting the obtained F and F0 into the regression equation obtained in step (1) to calculate the content of nicotine in samples having unknown concentration. The method provided by the invention utilizes the fluorescence resonance energy transfer between carbon quantum dots and metal quantum dots to propose a novel method for detecting nicotine; the method has advantages of being good in stability, high in sensitivity, good in selectivity, simple in operation method, and green.
Owner:CHINA TOBACCO YUNNAN IND

Dosimetric smoke determination method used in full-smoke exposure experiment

ActiveCN106840945AExplain the mechanism of toxicityGood repeatabilityComponent separationParticle suspension analysisIn vitro toxicologyEngineering
A dosimetric smoke determination method used in a full-smoke exposure experiment is used for real-time and quantitative determination of smoke dosage in a full-smoke exposure bin through combination of a quartz micro balance wafer and an inserted cell culture dish. The method has the maximum characteristic that an actual microenvironment for smoke exposure is simulated, the actual concentration (including the mass concentration of smoke particulate matter and nicotine concentration) of cigarette smoke in the full-smoke exposure bin is detected in a real-time, sensitive and quantitative mode, the dosage-effect relation of a smoke toxicity effect is accurately represented, and a real smoke dosage basis is provided for evaluation of cigarette smoke in-vitro toxicology. By applying method, the toxicity mechanism of the cigarette smoke can be better interpreted, and a method basis and technical support are provided for health risk assessment and research of tobacco products. In addition, the method is wide in applicability and can be applied to in-vitro toxicity testing and research of cigarettes, electronic cigarettes, cigarettes non-combustible in heating and aerosols different in source, and testing results are good in repeatability, high in stability and strong in sensitivity.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC

Method for preparing nicotine sulfate

The invention relates to a method for preparing nicotine sulfate, and belongs to the technical field of tobacco chemistry. According to the method, an aquaporin membrane and a polyamide membrane are used as forward osmosis concentration membranes, an inorganic salt is used as an absorbing agent, and a low-concentration nicotine distillate is subjected to forward osmosis concentration until the trapped fluid nicotine concentration is 5%-20%; 5%-40% sulfuric acid which is slightly excessive in chemical calculation is added into a trapped fluid to obtain a nicotine sulfate solution with relatively high concentration, and then evaporating and concentrating are carried out to obtain a 40%-60% nicotine sulfate product. According to the method, the concentration of the reactant nicotine during nicotine sulfate generation is greatly improved by adopting forward osmosis concentration, so that the concentration of the reaction product nicotine sulfate is improved, the evaporation capacity of water during preparation of a final product by subsequent evaporation and concentration is reduced, and the evaporation energy consumption is greatly reduced; by utilizing the characteristic of poor interception efficiency of forward osmosis concentration on ammonia, the ammonia content in the trapped liquid is greatly reduced, so that the ammonium salt content in a final product is greatly reduced,and the purity of nicotine sulfate is greatly improved.
Owner:CHINA TOBACCO YUNAN NEW MATERIAL

Method for determining nicotine content in tobacco product and method for simultaneously determining content of water, 1, 2-propylene glycol, glycerol and nicotine

PendingCN111337603ASolve the problem of inaccurate determination of nicotineComponent separationGlycerolTobacco product
The invention relates to a method for determining nicotine content in a tobacco product. The method comprises the following steps: selecting an organic solvent with a volume of V, mixing the organic solvent with a tobacco product with a mass of m, and extracting nicotine in the tobacco product to obtain an extract liquid, the organic solvent being a triethylamine-containing methanol solvent; carrying out nicotine content analysis on the extracting solution by adopting a gas chromatography method to obtain the nicotine concentration in the extracting solution; and calculating the nicotine content in the tobacco product according to V, m and the obtained nicotine concentration. According to the method, the nicotine in the tobacco product can be completely extracted, so that the nicotine in the tobacco product can be accurately determined. Meanwhile, a one-step extraction method is adopted, so that the operation steps are reduced, the loss of nicotine in the extraction operation is reduced, and the accuracy of nicotine measurement is further improved. The invention also relates to a method for simultaneously determining the content of water, 1, 2-propylene glycol, glycerol and nicotine in tobacco products.
Owner:CHINA TOBACCO GUIZHOU IND

Filter tip trapped nicotine concentration distribution pattern measuring method

InactiveCN103293085AAccurately grasp the characteristics of filter cut-off distributionSimple designParticle suspension analysisPermeability/surface area analysisDesign improvementFiltration
The invention discloses a filter tip trapped nicotine concentration distribution pattern measuring method which comprises the following steps: concentrically cutting a sucked filter tip along the axis after radially cutting with a laser, or radially cutting a sucked filter tip after concentrically cutting along the axis; after finishing cutting, separating the annular filter tip sections from the corresponding number of cylindrical filter tip sections, carrying out quantitative analysis on the nicotine content in the cut and separated filter tip sections; and after calculating the nicotine concentration, carrying out polynomial fitting on filter tip trapped nicotine concentration distribution data, or carrying out polynomial fitting and interpolation analysis to obtain the filter tip trapped nicotine concentration distribution pattern. By measuring the longitudinal, cross section radial and spatial distribution pattern of different filter tip trapped nicotine concentrations, the invention can master the filtration trapped distribution characteristics of nicotine in filter tips in different structures, can quantitatively analyze the nicotine trapping efficiency and contribution of all parts of filter tips in different structures in flue gas, and can be used for evaluation of flue gas nicotine filtering quality of functional filter tips and design improvement of the functional filter tips.
Owner:CHINA TOBACCO HUNAN INDAL CORP

A smoke dosimetry measurement method under full smoke exposure experiment

ActiveCN106840945BExplain the mechanism of toxicityGood repeatabilityComponent separationParticle suspension analysisIn vitro toxicologyDosimetry radiation
A dosimetric smoke determination method used in a full-smoke exposure experiment is used for real-time and quantitative determination of smoke dosage in a full-smoke exposure bin through combination of a quartz micro balance wafer and an inserted cell culture dish. The method has the maximum characteristic that an actual microenvironment for smoke exposure is simulated, the actual concentration (including the mass concentration of smoke particulate matter and nicotine concentration) of cigarette smoke in the full-smoke exposure bin is detected in a real-time, sensitive and quantitative mode, the dosage-effect relation of a smoke toxicity effect is accurately represented, and a real smoke dosage basis is provided for evaluation of cigarette smoke in-vitro toxicology. By applying method, the toxicity mechanism of the cigarette smoke can be better interpreted, and a method basis and technical support are provided for health risk assessment and research of tobacco products. In addition, the method is wide in applicability and can be applied to in-vitro toxicity testing and research of cigarettes, electronic cigarettes, cigarettes non-combustible in heating and aerosols different in source, and testing results are good in repeatability, high in stability and strong in sensitivity.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC
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