Analisa Kadar Nitrogen Dioksida (NO2) di Udara Ambien dengan Metode Griess Saltzman Menggunakan Spektrofotometer UV-Visible

Abstract

The analysis of the levels of ambient air nitrogen dioxide (NO2) has been carried out at the Dinas Lingkungan Hidup dan Kehutanan Provinsi Sumatera Utara. Ambient air nitrogen dioxide (NO2) levels were carried out using the Griess Saltzman method and then absorbance was measured using UV-Visible Spectrophotometry at a wavelength of 550 nm. The concentration of nitrogen dioxide was obtained at a concentration of 16.313 μg/m3, in ambient air samples with code 2023/UA/02/02 the concentration of nitrogen dioxide was obtained at a concentration of 0.8723 μg/m3 and in ambient air samples with code 2023/UA/02/03 nitrogen content dioxide obtained concentration of 3.3363 μg/m3. Based on Government Regulation of the Republic of Indonesia No. 22 of 2021 concerning the Implementation of Environmental Protection and Management, the maximum level of nitrogen dioxide (NO2) in ambient air for 1 hour is 200 μg/m3. The results of the analysis show that the ambient air samples analyzed meet the national ambient air quality standards.