Search Results

43 results

  1. TSRC, Tob. Sci. Res. Conf., 2019, 73, abstr. 097

    Methodology to determine the particle size distribution, mean, and standard deviation from sieve data

    ST. CHARLES F.K.(1); MORGAN W.T.(2)
    (1) St. Charles Consultancy, Lewisville, NC, USA; (2) RAI Services, Winston-Salem, NC, USA
    A method is described which allows the mean and standard deviation of particle size to be estimated from sieve data. The results can be used to calculate and plot the particle size distribution, the cumulative distribution, percentiles, and guide sieve ...
  2. TSRC, Tob. Sci. Res. Conf., 2016, 70, abstr. 77

    A robust method for evaluating the pH of e-liquids

    ST. CHARLES F.K.(1); MOLDOVEANU S.(2); SCOTT W.(2)
    (1) St. Charles Consultancy, Lewisville, NC, USA; (2) R.J. Reynolds Tobacco Co., Winston-Salem, NC, USA
    The measurement of pH is one of the simplest and most common analytical methods practiced in the laboratory. The pH-meter is calibrated using certified buffers, the electrode is placed in the solution, and if a reading is obtained, the value is used. In ...
  3. CORESTA Meeting, Agronomy/Phytopathology, 2015, Izmir, Turkey, AP 35

    Measuring canopy nitrogen nutrition in tobacco plants using hyper spectrum parameters

    ZOU Yong; YE Xiaoqing; YU Zhihong; CHEN Yufeng; WANG Wei; CHEN Jianjun
    (1) Shenzhen Tobacco Ind. Co., Ltd. of CNTC, Shenzhen, Guangdong, P.R. China; (2) Shenzhen Boton Flavors & Fragrances Co., Ltd., Shenzhen, Guangdong, P.R. China; (3) Tobacco Laboratory, South China Agricultural University, Guangzhou, Guangdong, P.R. China
    The aim of this paper is to study the quantitative relationship between above-ground nitrogen accumulation (ANA) of flue-cured tobacco and canopy spectral parameters, and then build a monitoring model for ANA of flue-cured tobacco based on various ...
  4. TSRC, Tob. Sci. Res. Conf., 2014, 68, abstr. 40

    Nicotine activity in tobacco

    ST.CHARLES F.K.(1); MOLDOVEANU S.C.(2)
    (1) St. Charles Consultancy, Lewisville, North Carolina, USA; (2) R.J. Reynolds Tobacco Company, Winston-Salem, North Carolina, USA
    The vapor pressure of pure nicotine has been reported in the literature. However, to the best of our knowledge, measurements of the vapor pressure of nicotine from tobacco have not been reported. Nicotine migration from tobacco to cigarette filters during ...
  5. TSRC, Tob. Sci. Res. Conf., 2013, 67, abstr. 38

    The migration during storage, transfer to smoke, and filtration efficiency of nicotine, glycerin, and propylene glycol in cigarettes.

    ST. CHARLES F.K.(1); MOLDOVEANU S.C.(2); MILLS H.D.(2); ANDRESEN N.P.(2)
    (1) St.Charles Consultancy, Winston-Salem, NC, USA; (2) R.J. Reynolds Tobacco Co., Winston Salem, NC, USA
    This study evaluated the migration during storage, transfer to smoke and filtration of nicotine, glycerin and propylene glycol (PG) for cigarettes with cellulose acetate/triacetin filters. Filtration efficiency (FE) and smoke yields were studied for two ...
  6. TSRC, Tob. Sci. Res. Conf., 2012, 66, abstr. 62

    The quantitative estimation of toxicant dose to cigarette smokers

    ST. CHARLES F.K.(1); MCAUGHEY J.(2); SHEPPERD J.(2)
    (1) St. Charles Consultancy, Winston Salem, NC, USA; (2) British American Tobacco (Investments) Limited, Southampton, UK
    For the risk assessment of cigarette smoke, a reliable estimate of the mass of chemical compounds retained in the body would be beneficial. Filter studies provide estimates of mouth exposure to compounds in cigarette smoke, but do not account for mouth ...
  7. CORESTA Meeting, Smoke Science/Product Technology, Jeju, 2007, SSPT 13

    Fast on-line tobacco smoke analysis with Photo Ionisation - Time-of-Flight-Mass Spectrometry - Part 1: Scientific background and basic principles

    ZIMMERMANN R.; MÜHLBERGER F.; MITSCHKE S.; STREIBEL T.; ROSE N.
    University of Augsburg, Analytical Chemistry, Institute of Physics, Augsburg, Germany
    Mass spectrometry (MS) with soft ionisation (i.e. non fragmenting ionisation) allows a direct on-line monitoring of organic compounds in complex gaseous matrices such as tobacco smoke. Photo ionisation (PI) methods are particularly well suited for this ...
  8. CORESTA Meeting, Smoke Science/Product Technology, Jeju, 2007, SSPT 15

    Fast on-line tobacco smoke analysis with Photo Ionisation - Time-of-Flight-Mass Spectrometry - Part 3: First measurements with a Smoke Analyzer Prototype system

    MITSCHKE S.; ROSE N.; ZIMMERMANN R.
    University of Augsburg, Analytical Chemistry, Institute of Physics, Augsburg, Germany
    In the past few years several studies were undertaken investigating mainstream and sidestream smoke with modern on-line mass spectrometric methods with soft ionisation methods, such as single-photon ionisation (SPI) and resonant multi photon ionisation ...
  9. CORESTA Meeting, Smoke Science/Product Technology, Jeju, 2007, SSPT 19

    Simultaneous on-line analysis of gas phase and particulate phase of cigarette mainstream smoke

    ADAM T.; McAUGHEY J.; MITSCHKE S.; McGRATH C.; MOCKER C.; ZIMMERMANN R.
    University of Augsburg, Analytical Chemistry, Institute of Physics, Augsburg, Germany
    Tobacco smoke is a complex and dynamic matrix consisting of gaseous and particulate material, in which about 4800 constituents have been identified. The chemical composition and partition between phases of the smoke can change continuously and is strongly ...