The correlations between WSOC and other components were studied to primarily identify the sources of atmospheric nanoparticles. Secondary organic carbon (SOA) was estimated using elemental carbon (EC) – tracer method. Selected characteristics of nanoparticles including mass concentrations, number concentrations, and WSOC were determined. | Vietnam Journal of Science and Technology 55 (6) (2017) 745-755 DOI: LEVELS AND WATER SOLUBLE ORGANIC CARBON OF ATMOSPHERIC NANOPARTICLES IN A LOCATION OF HA NOI, VIET NAM Nguyen Thi Thu Thuy1, 2, Nghiem Trung Dung1, *, Kazuhiko Sekiguchi3, Ryosuke Yamaguchi3, Ly Bich Thuy1, Nguyen Thi Thu Hien1 1 School of Environmental Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet, Ha Noi, Viet Nam 2 Faculty of International Training, Thai Nguyen University of Technology, 3/2 Road, Thai Nguyen, Viet Nam 3 Graduate School of Science and Engineering, Saitama University, 225 Shimo-Okubo Sakura, Saitama, Japan * Email: Received: 10 April 2017; Accepted for publication: 16 June 2017 Abstract. Atmospheric nanoparticles (NPs or ) were investigated at a site inside the campus of Hanoi University of Science and Technology (HUST) in Hanoi, Viet Nam. The sampling was conducted during a rainy season (August, 2015) and a dry season (October to December, 2015). Mass was weighed by an electronic micro-balance, Sartorius ME2, 10-6 g. Number concentrations were measured by an electrical mobility spectrometer (NanoScan, SMPS TSI Model 3910). Water soluble organic carbon (WSOC) was analyzed by a total carbon analyzer (TOC-VCHP, Shimazu). The correlations between WSOC and other components were studied to primarily identify the sources of atmospheric nanoparticles. Secondary organic carbon (SOA) was estimated using elemental carbon (EC) – tracer method. Selected characteristics of nanoparticles including mass concentrations, number concentrations, and WSOC were determined. Keywords: nanoparticles, mass concentration, number concentration, WSOC, SOA, Ha Noi. 1. INTRODUCTION Recently, the scientific community has high concern about nanoparticles (NPs), which are considered to give probably adverse impacts on human health [1], visibility and climate change [2]. Such negative impacts could be .
