Browsing by Author "Shoffian Amin Jaafar"

Now showing 1 - 4 of 4
  • Thumbnail Image
    ItemEmbargo
    Concentration and source apportionment of volatile organic compounds (VOCs) in the ambient air of Kuala Lumpur, Malaysia
    (Springer, 2017) Puteri Nurafidah Hosaini; Md Firoz Khan; Nur Ili Hamizah Mustaffa; Norhaniza Amil; Noorlin Mohamad; Shoffian Amin Jaafar; Mohd Shahrul Mohd Nadzir; Mohd Talib Latif
    The accumulation of volatile organic compounds (VOCs) in ambient air affects air quality through the generation of surface level ozone and secondary organic aerosol. A study of the distribution and source apportionment of VOCs was conducted at two stations to investigate the air quality status of Kuala Lumpur. Samples of ambient air were collected into Tedlar sampling bags using an air sampling pump and then pre-concentrated with solid-phase micro-extraction fibre. Gas chromatography-mass spectrometry (GC-MS) was employed to measure the VOC species.
  • Thumbnail Image
    ItemEmbargo
    Monsoonal variations in atmospheric surfactants at different coastal areas of the Malaysian Peninsula
    (Elsevier, 2016) Shoffian Amin Jaafar; Mohd Talib Latif; Intan Suraya Razak; Muhammad Zulhilmi Shaharudin; Md Firoz Khan; Nurul Bahiyah Abd Wahid; Suhaimi Suratman
    This study determined the effect of monsoonal changes on the composition of atmospheric surfactants in coastal areas. The composition of anions (SO42 −, NO3−, Cl−, F−) and the major elements (Ca, K, Mg, Na) in aerosols were used to determine the possible sources of surfactants. Surfactant compositions were determined using a colori-metric method as methylene blue active substances (MBAS) and disulphine blue active substances (DBAS). The anion and major element compositions of the aerosol samples were determined by ion chromatography (IC) and inductively coupled plasma mass spectrometry (ICP-MS), respectively.
  • Thumbnail Image
    ItemRestricted
    Surfactants in the sea-surface microlayer and atmospheric aerosol around the southern region of Peninsular Malaysia
    (Elsevier, 2014) Shoffian Amin Jaafar; Mohd Talib Latif; Chong Woan Chian; Wong Sook Han; Nurul Bahiyah Abd Wahid; Intan Suraya Razak; Md Firoz Khan; Norhayati Mohd Tahir
    This study was conducted to determine the composition of surfactants in the sea-surface microlayer (SML) and atmospheric aerosol around the southern region of the Peninsular Malaysia. Surfactants in samples taken from the SML and atmospheric aerosol were determined using a colorimetric method, as either methylene blue active substances (MBAS) or disulphine blue active substances (DBAS).
  • Thumbnail Image
    ItemEmbargo
    Underestimation of respirable crystalline silica (RCS) compliance status among the granite crusher operators in Malaysian quarries
    (Springer, 2016) Suhaily Amran; Mohd Talib Latif; Md Firoz Khan; Eric Goh; Abdul Mutalib Leman; Shoffian Amin Jaafar
    The aim of this study is to determine exposure levels as well as compliance status on respirable dust and respirable crystalline silica (RCS)-quartz exposure among crusher operators at Malaysian quarries. The exposure level at each crushing process was compared. Monitoring was performed among 70 crusher operators at nine quarries. Eight hours long-term personal samples were collected according to the National Institute of Occupational Safety and Health (NIOSH) Manual Analytical Method (NMAM) 0600 for respirable dust and NMAM 7500 for respirable crystalline silica (RCS-quartz).