The Malaysian Journal of Analytical Sciences Vol 12 No 2 (2008): 432 – 443







S. Mariam Sumari1*, Rusdin Laiman1,  Nesamalar Kantasamy1, Siniarovina ak Urban Sinyaw2


1 Faculty of Applied Sciences, UiTM, Shah Alam, Selangor

2 The Malaysian Meteorological Department,Petaling Jaya, Selangor.


*Corresponding author:



Air samples were collected from 2004 to 2005 using four-staged filter packs at an urban site  Petaling Jaya (PJ) and a rural-agricultural site Tanah Rata (TR).  The samples were analysed for reactive gases consisting of  NH3, HNO3, HCl and SO2 while the aerosol components  were analysed  for SO42– , NO3- , Cl-, Na+, K+, Ca2+, Mg2+ and NH4+.  For both PJ and TR,  analysis indicates the dry deposition was dominated by the gaseous components. They range from about 78% to 87% of total compositions for urban PJ and 59% to 63% for rural TR. .Among the four reactive gases,  NH3 is the most dominating component at both sites. Elevated NH3 concentration in TR was mainly attributed to the use of nitrogenous fertilizer. For PJ high NH3 could be due to local  air pollution created by industries  as well as agricultural activities.  The acidic species associated with SOx and NOx are typically more abundant at PJ than TR. Their presence, and  for most other chemical species, show similar increasing trend, and this reflect the growing use of  fossil fuels associated with urbanization and industrialization, especially for PJ.


Keywords: Four-staged filter packs, reactive gases, aerosols, nitrogenous fertilizer



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