Ambient air monitoring of nitrogen dioxide at Kalimati, Tirtomartani, Kalasan, Sleman, Yogyakarta

Nitrogen dioxide (NO2) is one of parameters in air quality according to Indonesia Government No. 41/1999. NO2 has influence in respiratory problem of human being if it exceeds threshold level (400 μgNO2/Nm3). This study is air monitoring of NO2 concentration in ambient air and it uses a Griess Saltzman method using the spectrophotometer (Indonesia Standard SNI 19-7119.2-2005) near of Plywood Industry and Main Road. The sampling location has two points at Kalimati Village, Tirtomartani, Kalasan, Sleman, D.I Yogyakarta. On December 2016, the results show which NO2 concentration is below threshold level with 0,469 μg NO2/Nm3 at first point and 0,234 μg NO2/Nm3 at second point