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Passenger exposure to volatile organic compounds (VOCs) emitted from vehicle interiors hasincreasingly  drawn  public  concern  over  their  potential  health  risks.  This  study  aimed  to investigate  ambient  levels  of  in-cabin  VOCs  in  a  new  car  over  the  period  of  one  year  after first  delivery.  The  relationship  between  VOC  concentrations  and  in-cabin  temperature  was also  studied.  Seventeen  active  air  samplings  inside  a  parked  new  car  were  conducted  from February  2012  to  February  2013  using  sorbent  tubes.  Six  VOCs  were  measured  with  first-month average concentrations of 215 μgm-3for benzene, 65.6 μgm-3for toluene, 151 μgm-3for  1,2,3-trimethylbenzene,  806 μgm-3for  ethyl  acetate,  183 μgm-3for  formaldehyde,  and 28.2 μgm-3for  acetone.  The  concentration  profiles  of  all  VOCs  except  formaldehyde declined, falling below the detection limits towards theend of the 1-year monitoring period. Formaldehyde concentrations were found to be directly proportional to in-cabin temperature at a significance level of p=0.05 during the first five months.

Variation of VOCs Inside a New Car during the First Year and Their Relationship to Temperature