1. Long term monitoring for PCB in ambient air using low volume air sampler Hyogo Prefectural Institute of Public Health and Environmental Sciences: Masahiro Tsurukawa, Chisato Matsumura, Takeshi Nakano Background & Objectives PCBs (Polychlorinated Biphenyls) Chemicals that caused “Kanemi-yusho” Designated as POPs(Persistent Organic Pollutants) Resident to degradation ， Long transfer ， High acuumulation in the ecosystem ， Toxity Influences on the humans and the ecosystem has been concerned We need to monitor the PCB concentration carefully because PCB productions are stored in many dispersed places. Monitoring was carried out from 2000 to 2005 in Hyogo prefecture inJapan.Regarding the sampling location and period, sampling was carried out in urban, industrial, rural area and collected continuously for about one month. Low volume air sampling method is effective for long term monitoring. Research method ○Monitoring was conducted at three points at Nishiwaki (rural area),Takasago(industrial area), Suma in Kobe (urban area). ○PCB concentrations in each sample were determined with high resolution GC/MS (JEOL: JMS700). GC/MS analysis : The analysis was carried out using a HP 6890 gas chromatograph connected to a JMS-800D mass spectrometer (JEOL Ltd. Japan) operating at a resolution >10 000. Co-PCB, Co-PXB and PXDF were analyzed using HT8-PCB column. Temperature program used for congener specific separation of the PCB, PXB and PXDF on HT8-PCB column: 120C, 20C/min. to 180C, 2C/min. to 260C. 5C/min. to 300C, 5 min. isothermal. Monitoring ions for GC/MS analysis are listed in Table. Standa GC/MS analysis : The analysis was carried out using a HP 6890 gas chromatograph connected to a JMS-800D mass spectrometer (JEOL Ltd. Japan) operating at a resolution >10 000. Co-PCB, Co-PXB and PXDF were analyzed using HT8-PCB column. Temperature program used for congener specific separation of the PCB, PXB and PXDF on HT8-PCB column: 120C, 20C/min. to 180C, 2C/min. to 260C. 5C/min. to 300C, 5 min. isothermal. Monitoring ions for GC/MS analysis are listed in Table. Standards: Commercially-available native/labeled standards were obtained from CIL as authentic standard/mixtures for crosschecking the assignment., 4’-bromo- 3, 3’, 4, 5-tetrachloro biphenyl was obtained from CIL for a PXB standard. GC/MS analysis : The analysis was carried out using a HP 6890 gas chromatograph connected to a JMS-800D mass spectrometer (JEOL Ltd. Japan) operating at a resolution >10 000. Co-PCB, Co-PXB and PXDF were analyzed using HT8-PCB column. Temperature program used for congener specific separation of the PCB, PXB and PXDF on HT8-PCB column: 120C, 20C/min. to 180C, 2C/min. to 260C. 5C/min. to 300C, 5 min. isothermal. Monitoring ions for GC/MS analysis are listed in Table. Standards: Commercially-available native/labeled standards were obtained from CIL as authentic standard/mixtures for crosschecking the assignment., 4’-bromo- 3, 3’, 4, 5-tetrachloro biphenyl was obtained from CIL for a PXB standard PCB usage(t) 0.01 0.1 1 10 100 1000 19701975198019851990199520002005 0.01 0.1 1 10 100 1000 19701975198019851990199520002005 Ambient air PCB level (ng/m 3 ) Result and Discussion Daily variation of Dioxin Concentration （ compared with Hi volume air sampler and Low volume air sampler) Atropisomer in air and adipose tissue (HpCB)