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Huang H.,China Tobacco Fujian Industrial Co. | Jiang J.,CAS Zhengzhou Research Institute | Liang H.,China Tobacco Fujian Industrial Co. | Liu X.,China Tobacco Fujian Industrial Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2014

In order to improve the accuracy of measurement results, the uncertainty in determination of butyl acetate in tipping paper by headspace gas chromatography (HS-GC) was analyzed on the basis of JJF 1059.1-2012 "Evaluation and Expression of Uncertainty in Measurement", and the uncertainty of individual component affecting measurement was calculated. The results showed that: 1) The factors influencing measurement uncertainty included sample preparation, standard solution preparation, repeatability examination, calibration curve fitting, etc., particularly the calibration curve fitting. 2) When the residue of butyl acetate in tipping paper sample was 0.54 mg/m2, the combined uncertainty and the expanded uncertainty of measurement results were 0.024 and 0.05 mg/m2 (P=95%, k=2), respectively. Therefore, the analysis accuracy could be improved by means of abandoning stepwise dilution method during the solution preparation of standard working curve or reducing the concentration range of standard working solution.


Qin G.,CAS Zhengzhou Research Institute | Wang D.,China Tobacco Fujian Industrial Co. | Li B.,CAS Zhengzhou Research Institute | Zhu W.,CAS Zhengzhou Research Institute | Wang P.,CAS Zhengzhou Research Institute
Tobacco Science and Technology | Year: 2013

The residence time of cut tobacco in a rotary cylinder was studied with an in-house cold state experimental platform, the variations of residence time at different rotating speeds and inclination of the cylinder, air velocities, cut tobacco infeed rates and moisture contents were investigated separately. Basing on Friedmam-Marshall model, a mathematical model for predicting cut tobacco residence time was developed by introducing moisture content as a correction factor and the incorporation of all influencing factors, and the developed model was validated. The results showed that: 1) The moisture content in tobacco was an important factor in the determination of residence time of cut tobacco in a rotary cylinder, however, it was exclusive of the conventional predicting model. 2) When the conventional model modified with moisture content was used to predict the residence time of cut tobacco, the deviation between predicted value and tested value decreased, while the precision of model increased.


Wang Y.,CAS Zhengzhou Research Institute | Zhu W.,CAS Zhengzhou Research Institute | Liu K.,CAS Zhengzhou Research Institute | Li Q.,China Tobacco Fujian Industrial Co. | And 5 more authors.
Tobacco Science and Technology | Year: 2015

In order to analyze the changes of physical properties of, moisture content and aroma components in cut strips in dual-temperature cylinder drying, the filling values and elasticity of cut strips dried in cylinder at constant temperatures of 100, 120, 130, 140, 150℃ and at temperature combinations of 150/100 (first section temperature/second section temperature), 140/100, 130/100 and 120/100℃ were determined, and the contents of petroleum ether extracts and aroma components in cut strips dried at constant and varied temperatures were compared. For the temperature combination of 140/100℃, experiments were conducted by changing cylinder wall temperature when tobacco moisture contents reached 19%, 17%, 15% separately. The results showed that: 1) Under high/low temperature combination conditions, the drying efficiency of cut strips was obviously promoted by rising cylinder wall temperature at earlier drying stage. 2) Comparing with constant high temperature drying, high/low temperature combination was helpful to improving the elasticity and filling value of cut strips, meantime, the aroma components, such as brown reaction products and carotenoids degradation products, increased obviously. 3) Under dual-temperature drying, the filling value of and total aroma component content in dried cut strips would decrease, while its elasticity would increase when temperature transition point was the moisture content reached 15% instead of 19%. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved.


Xu D.,CAS Zhengzhou Research Institute | Du J.,CAS Zhengzhou Research Institute | Li Y.,China Tobacco Fujian Industrial Co. | Chen H.,China Tobacco Fujian Industrial Co. | And 5 more authors.
Tobacco Science and Technology | Year: 2015

For determining the airtightness of cigarette packets accurately, a negative pressure air extraction method was studied, the key test parameters were determined and the method was verified. The airtightness of packets of major domestic cigarette brands was detected by this method. The results showed that: 1) The appropriate detection conditions were air extraction volume 200 mL/min, packet perforation depth > half of packet thickness. 2) The coefficient of variation of detection results was less than 1%, it indicated that the repeatability of this method was good. 3) The average airtightness of hard packets (-3.508 kPa) was better than that of soft ones (-1.138 kPa), and airtightness differed greatly between the hard and soft packets of different brands. The proportion of packets whose air tightness was better than the average level reached 60% for hard packets, while which was only 33.33% for soft packets. © 2015, Editorial Office of Tobacco Science & Technology. All right reserved.


Huang C.,China Tobacco Fujian Industrial Co. | Cai G.,China Tobacco Fujian Industrial Co. | Zhao Y.,China Tobacco Fujian Industrial Co. | Su M.,China Tobacco Fujian Industrial Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2013

In order to study the correlations between the delivery of hydrogen cyanide in mainstream smoke of cigarette made of single grade tobacco and the routine chemical components in the tobacco, the contents of total sugar, total nitrogen, reducing sugar, nicotine, potassium and chlorine in 15 kinds of flue-cured tobacco samples and the delivery of hydrogen cyanide in mainstream smoke were determined with continuous flow analyzer. The results showed that the delivery of hydrogen cyanide in mainstream cigarette smoke significantly positively correlated with the contents of total nitrogen, nicotine and chlorine, while significantly negatively correlated with the contents of total sugar, reducing sugar and potassium in tobacco leaves.


Wang D.,China Tobacco Fujian Industrial Co. | Zhou Y.,China Tobacco Fujian Industrial Co. | Xie J.,China Tobacco Fujian Industrial Co.
Tobacco Science and Technology | Year: 2013

To improve casing utilization and casing uniformity, a two-step burley tobacco casing process was adopted, at the first casing step, burley strips were cased after conditioning, heating and loosening; at the second casing step, the cut strips were cased. The preferable casing proportion at each casing step was investigated as well. The results showed that comparing with traditional twice strip casing, the two-step casing raised the casing uniformity coefficient from 53.52% to 90.14% and the effective utilization rate of casing from 61.19% to 88.25% when the ratio of strip casing to cut strip casing was 3:1.


Zhang H.,China Tobacco Fujian Industrial Co. | Shen J.,China Tobacco Fujian Industrial Co. | Lin Y.,Longyan Tobacco Industrial Co. | Lin Z.,China Tobacco Fujian Industrial Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2013

To solve the problems, such as decentralized R&D data management, lack of effective R&D process control and management, insufficient coordination between R&D and manufacture, etc, a PDM-based cigarette product R&D management system was designed by introducing of PDM (Product Data Management) concept. With the architecture based on B/S system and adopting object-oriented technology, the designed system established a product data model by taking product composition as an object, and established a R&D process model by taking the key business unit, activity and role of R&D as objects. The system implemented close integration with MES (Manufacturing Execution System) and ERP (Enterprise Resource Planning) via the unified product data model. The results of application showed that the system consolidated the resource, process and data of R&D, realized the effective management and control of R&D data and process, and enhanced the collaboration between R&D and manufacture.


Zhang J.,China Tobacco Fujian Industrial Co. | Huang C.,China Tobacco Fujian Industrial Co. | Deng Q.,China Tobacco Fujian Industrial Co. | Wu Q.,China Tobacco Fujian Industrial Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2013

An ion chromatography method for determining the sodium bisulfoxylate formaldehyde in tobacco additives was developed. The sample was extracted with dilute aqueous alkali and separated by ion chromatography, then determined by ampere detector after elution with aqueous potassium hydroxide. The results showed that the linearity range and recovery of this method were 0.1-20.0 mg/L and 92.55%-98.76%, respectively. The lowest limit of quantitative detection was 0.05 mg/L with the relative standard deviation less than 5%. This method is of simple pretreatment, better sample stability, higher accuracy and better practical uses.


Wang D.,China Tobacco Fujian Industrial Co. | Li H.,China Tobacco Fujian Industrial Co. | Li Y.,China Tobacco Fujian Industrial Co. | Yu Z.,China Tobacco Fujian Industrial Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2013

In order to maintain best cigarette quality and eliminate the influences of mildewed and off-grade tobacco strips, the strip cases containing mildewed strips were carefully examined, it was found that the moisture content and density of the strips in the cases were higher than the set values. Therefore, a monitor device was adopted, once moisture content or density higher than the set values was found, the case would be removed off the processing line. After the application of that technology, the frequency of strip case containing mildewed strips found in primary processing line reduced from 83 to 8 cases per year. Further, the influence of the proportion of off-grade strips in cases on cigarettes'sensory quality was analyzed, and a laser sorter was used to reject the off-grade strips, the sensory evaluation score of cigarette raised by 3.5 points because of that improvement.


Zhang J.,China Tobacco Fujian Industrial Co. | Liu X.,China Tobacco Fujian Industrial Co. | Huang C.,China Tobacco Fujian Industrial Co. | Liu Z.,China Tobacco Fujian Industrial Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2013

In order to determine the chemical species of arsenic (As) in tobacco samples, a method combining ultrasonic solvent extraction and high performance liquid chromatography (HPLC) with inductively coupled plasma-mass spectrometry (ICP-MS) was developed to separate and analyze six species of arsenic, including arsenous acid [As(III)], arsenic acid [As(V)], dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), arsenobetaine (AsB), and arsenocholine (AsC). The result showed that the baselines of the six species of arsenic mentioned above were separated within 15 mins by Hamilton PRPX-100 (250×4.1 mm, 10 μm) anion exchange column and using 15 mmol/L (NH4)2HPO4 (pH6.0) as the mobile phase. The linear ranges were no less than two orders of magnitude. The detection limit ranged from 0.44 to 0.98 μg/L and the recoveries were from 85.19% to 87.31% with the RSD (n=5) of 2.45% to 3.56%. The content of As in tobacco was low, and some arsenic species existed in the forms of DMA and MMA were of lower toxicity. Ultrasonic solvent extraction could extract the organic and inorganic As in tobacco simultaneously and reflect the distribution of As species in tobacco samples objectively. This method is accurate, reliable, and suitable for the speciation analysis of As in tobacco, and can provide a reference for the safety evaluation of tobacco.

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