Search Results

20 results

  1. CORESTA Meeting, Smoke Science/Product Technology, 2017, Kitzbühel, ST 19

    An alternative strategy for the determination of pH values of aerosol from electronic cigarettes

    JOZA P.; MOHAMMAD A.; RICKERT W.S.
    Labstat International ULC, Kitchener, ON, Canada
    Any pH determination to measure the effective acid-base properties of an aerosol is dependent on the measurement technique. Determinations of aerosol pH using puff-by-puff collections are influenced by the buffer used to condition the electrode,...
  2. TSRC, Tob. Sci. Res. Conf., 2017, 71, abstr. 047

    The impact of 2, 4-dinitrophenylhydrazine (DNPH) background in the determination of carbonyls compounds in e-cigarette vapor

    DONISA C.; JOZA P.; RODRIGUEZ-LAFUENTE A.; RICKERT W.S.
    Labstat International, Kitchener, ON, Canada
    Carbonyl compounds, are known to be present in some e-liquid formulations and can be formed during aerosol generation. Analysis of these compounds, as their hydrazones (2,4-dinitrophenylhydrazine; DNPH) are routinely performed using high performance...
  3. TSRC, Tob. Sci. Res. Conf., 2017, 71, abstr. 087

    Analysis of organic acid content in e-liquids and e-cigarette aerosol by high performance liquid chromatography – ultraviolet detection (HPLC-UV)

    RODRIGUEZ-LAFUENTE A.; LODEVICO R.; SHARIFI M.; JOZA P.; RICKERT W.S.
    Labstat International, Kitchener, ON, Canada
    Weak organic acids can be used as preservative agents, potentially affecting the stability of e-cigarette solutions. However, they can also impact characteristics like the aroma and taste of aerosols. The objective of this study was to develop and...
  4. CORESTA Congress, Berlin, 2016, Smoke Science/Product Technology Groups, ST 43

    Analysis of nicotine and nicotine related substances in electronic cigarette refill solutions and aerosols by liquid chromatography-tandem mass spectrometry

    LIU X.; JOZA P.; RICKERT W.S.
    Labstat International ULC, Kitchener, Ontario, Canada
    The objective of this study was to develop and validate an analytical method for determining nicotine, and nicotine related compounds (i.e. nicotine-N-oxide, cotinine, nornicotine, anatabine, myosmine, anabasine, and ß-nicotyrine) in e-cigarette...
  5. CORESTA Congress, Berlin, 2016, Smoke Science/Product Technology Groups, ST 47

    An alternative strategy for the determination of metals in the aerosol from electronic cigarettes

    JOZA P.; DONISA C.; RICKERT W.S.
    Labstat International ULC, Kitchener, Ontario, Canada
    Methods for the determination of metals in mainstream cigarette smoke, in general, have limited flexibility and are susceptible to sporadic high levels of background contamination when applied to the collection of aerosol from electronic devices. To...
  6. TSRC, Tob. Sci. Res. Conf., 2014, 68, abstr. 78

    Determination of potential flavour additives in tobacco products by headspace solid phase microextraction - gas chromatography-mass spectrometry (HS-SPME-GCMS)

    LI D.; JOZA P.; MASTERS A.; RICKERT W.S.
    Labstat International ULC, Kitchener, Ontario, Canada
    Rapid screening techniques for the detection of flavour components in tobacco using headspace - solid phase microextraction - gas chromatography mass spectrometry (HS-SPME-GCMS) are primarily qualitative, requiring additional analysis to provide the...
  7. CORESTA Meeting, Smoke Science/Product Technology, 2011, Graz, ST 11

    Determination of N-nitrososarcosine in tobacco and tobacco products using Isotope Dilution Liquid Chromatography Tandem Mass Spectrometry

    WU J.; RICKERT W.S.; MASTERS A.P.; JOZA J.P.
    Labstat International ULC, Kitchener, Ontario, Canada
    A simple, fast, selective, and robust analytical method for the determination of N-nitrososarcosine (NSAR) has been developed based on Supported Liquid-Liquid Extraction (SL-L) coupled with Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)....
  8. CORESTA Congress, Edinburgh, 2010, SSPT 30

    Determination of 21 polycyclic aromatic hydrocarbons in smokeless tobacco products: Method validation, application and comparisons

    MASTERS A.P.; BOA M.; JOZA J.P.; RICKERT W.S.
    Labstat International Inc., Kitchener, ON, Canada
    An improved method to measure levels of polycyclic aromatic hydrocarbons (PAH) in smokeless tobacco products has been developed and validated. This method utilized base saponification and partitioning steps associated with the analysis of...
  9. CORESTA Congress, Edinburgh, 2010, SSPT 31

    Mutagenic, cytotoxic, and genotoxic properties of tobacco smoke produced by little cigars available on the Canadian market

    WAGSTAFF W.G.; RICKERT W.S.; TRIVEDI A.H.; MOMIN R.A.; LAUTERBACH J.H.
    Labstat International Inc., Kitchener, ON, Canada & Lauterbach & Associates, Macon, GA, USA
    Little cigars (also known as cigarillos) have been increasing in popularity with respect to cigarettes; but relatively little is known about the toxicology of the mainstream smoke (MSS) from little cigars. Therefore, the objective of this study was...