Search Results

32 results

  1. CORESTA Congress, Quebec, 2014, Smoke Science/Product Technology Groups, ST 09

    Impact of reducing the number of analysis replicates prescribed by the Canadian Tobacco Reporting Regulations on the level of information obtained from cigarette emission testing

    VOISINE R.(1); ERRINGTON G.(2); McADAM K.G.(2)
    (1) Imperial Tobacco Canada Ltd, Montréal, QC, Canada; (2) British American Tobacco, Group R&D, Southampton, U.K.
    Before the introduction of the Canadian Tobacco Reporting Regulations (TRR), the Regulator stated a need to obtain more information on tobacco product emissions to support, amongst other things, “better program design” and the “right to know”. The TRR ...
  2. CORESTA Congress, Quebec, 2014, Smoke Science/Product Technology Groups, ST 49

    Use of chiroptical spectroscopy to determine the ionisation status of (S)-nicotine in electronic cigarette formulations and snus

    CLAYTON P.M.; VAS C.A.; McADAM K.G.
    British American Tobacco, Group R&D, Southampton, U.K.
    In the vicinity of neutral pH, nicotine is equilibrated between unprotonated and monoprotonated states. The equilibrium is best described by the acid dissociation constant (Ka) and its logarithmic function known as pK a which in non-aqueous solution is ...
  3. CORESTA Congress, Quebec, 2014, Smoke Science/Product Technology Groups, ST 85

    Highly time-resolved two-dimensional mapping of molecular combustion and pyrolysis product concentrations: looking into a burning cigarette during puffing

    ZIMMERMANN R.(1); HERTZ-SCHÜNEMANN R.(1); EHLERT S.(1); LIU C.(2); McADAM K.G.(2); BAKER R.R.(2)†; COBURN S.(2); STREIBEL T.(1)
    (1) University of Rostock, Chair of Analytical Chemistry, Rostock, Germany; (2) British American Tobacco, Group R&D, Southampton, U.K.; (†) Deceased
    Combustion and pyrolysis are complex and dynamic chemical processes that are by far not fully understood. This is in particular true when the highly dynamic cigarettes smoking process is considered. The gas phase chemistry of tobacco combustion in its ...
  4. CORESTA Congress, Sapporo, 2012, Smoke Science/Product Technology Groups, SSPT 09

    Is the 44 mm Cambridge filter pad suitable for trapping total particulate matter under ISO and Health Canada Intensive regimes?

    DRAKE L.; COCKAYNE L.; McADAM K.G.; McAUGHEY J.
    British American Tobacco, Group R&D, Southampton, UK
    Cambridge filter pads (CFP) are used for the collection of total particulate matter (TPM) in cigarette smoke and ISO standard 4387:2000 suggests a TPM limit of 150 mg per 44 mm CFP. Machine smoke yields of current cigarettes are much lower than those when ...
  5. CORESTA Congress, Sapporo, 2012, Smoke Science/Product Technology Groups, SSPT 32

    Hyphenation of a cigarette smoking simulator and a micro-probe between a time-of-flight mass spectrometer for the analysis of pyrolysis and combustion products from a burning cigarette

    HERTZ R.(1); BUSCH C.(1); STREIBEL T.(1,3); LIU C.(2); McADAM K.G.(2); ZIMMERMANN R.(1,3)
    (1) Joint Mass Spectrometry Centre, Chair of Analytical Chemistry, Institute of Chemistry, University of Rostock, Rostock, Germany; (2) British American Tobacco, Group R&D, Southampton, UK; (3) Joint Mass Spectrometry Centre, Cooperation Group “Analysis of Complex Molecular Systems”, Institute of Ecological Chemistry, Helmholtz Zentrum München – German Research Centre for Environmental Health, Neuherberg, Germany
    The first part of the work addresses a coupling between a cigarette smoking simulator and a time-of-flight mass spectrometer which was constructed to allow the sampling and analysis of fresh tobacco smoke under simulated burning conditions. With flexible ...
  6. Tobacco Science & Technology, 2012, 6, p. 5-15, ISSN.1002-0861

    A systematic improvement in filtration efficiency of aldehydes in mainstream cigarette smoke

    BRANTON P.J.(1); LUI Chuan(1); McADAM K.G.(1); QU Wen-Hui(2); LU An-Hui(2)
    (1) Group Research & Development Centre, British American Tobacco, Regents Park Road, Millbrook, Southampton SO15 8TL, UK; (2) State Key Laboratory for Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P R China
    To remove the aldehydes from tobacco smoke by activated carbon used in a cigarette filter, the effects of activated carbon surface area, particle size, pore size and distribution, and surface chemistry have been systematically evaluated for the filtration ...
  7. CORESTA Meeting, Smoke Science/Product Technology, 2011, Graz, ST 10

    A method for the determination of NNAL, iso-NNAL & NNA in smokeless tobacco products

    VAN HEEMST J.; WRIGHT C.G.; KIMPTON H.J.; McADAM K.G.
    British American Tobacco, GR&D, Southampton, UK
    The presence of 28 compounds in smokeless tobacco products (STPs) was summarized in IARC Monograph 89, including nitroso compounds such as NNN (N-nitrosonornicotine), NNK (4-(N-methylnitrosamino)-1-(3-pyridyl)-1-butanone) and NNAL (4-(methylnitrosamino)-1 ...
  8. CORESTA Meeting, Smoke Science/Product Technology, 2011, Graz, ST 16

    Spectroscopic investigations into the acid-base properties of nicotine at different temperatures

    CLAYTON P.M.(1); VAS C.(1); BUI T.T.T.(2); DRAKE A.F.(2); McADAM K.G.(1)
    (1) British American Tobacco, Group R&D, Southampton, UK; (2) Applied Photophysics Limited, Leatherhead, UK
    The nicotine molecule contains two separate and distinct ionisable moieties both centred on nitrogen atoms. In aqueous solution nicotine can exist in three states of ionisation: under acidic conditions (low pH) it will be present predominantly as the ...