This  study  aimed  to  determine  the  composition,  source  apportionment  and  health  risk  assessment  (HRA)  of  indoor  particulate  matter  (PM2.5)  in  selected  Malaysia  training  institutes. PM2.5 samples were collected from lecture halls, laboratories and lecturer offices in  Institut Latihan Kementerian Kesihatan Malaysia Sungai Buloh (SB) and Institut Latihan Kementerian   Kesihatan  Malaysia  Sultan  Azlan  Shah  (SAS).  Sampling  were  conducted over a period of eight  hours sampling for five consecutive days with a total number of 30 samples. The samples were  collected on 47 mm micro fiber glass filter paper (0.2 µm pore size,  Whatman)  using  low  volume   air  sampler  (LVS)  at  5  L  min?¹  flow  rate.  The composition  of  PM2.5   for  water-soluble   ionic  species  (WSIS)  and  trace  metals  were determined   using   ion   chromatography   (IC)    and   inductively   cou.....

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This study aims to determine the particulate matter (PM2.5) mass concentrations and the comfort parameters (total bacterialm counts (TBC), total fungal counts (TFC), relative humidity and temperature) in a university building. The samplings were carried out in three different indoor areas, including lecture hall, laboratory and lecturer office. PM2.5 samples were collected over a period of 8 h sampling using a low volume sampler (LVS). The anemometer Model Kestrel 0855YEL was used to measure relative humidity and temperature parameters. The sampling of airborne microorganisms was conducted by using microbial sampler at 350 L air sampled volume. The results showed that the highest average of PM2.5 was at lecture hall (88.54 ± 26.21 μgm-3) followed by lecturer office (69.79 ± 19.06 μgm-3) and laboratory (47.92 ± 24.88 μgm-3). The mean of TBC and TFC readings recorded as follow; 32.71 ± 5.91 cfu m-3 and 76.71 ± 21.5 cfu m-3 for laboratory, 112.1 ± 29.06 cfu m-3 and 124.67 ± 23.3.....

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