Penentuan Kadar Amonia (NH3) pada Limbah Cair Industri dengan Metode Spektrofotometri UV-Visible di UPT. Laboratorium Lingkungan Dinas Lingkungan Hidup dan Kehutanan Provinsi Sumatera Utara

Abstract

Research on the determination of Ammonia (NH₃) levels in industrial wastewater has been carried out at UPT. Laboratory of the Environment Laboratory of North Sumatra Province. Determination of Ammonia levels (NH₃) Phenate with sodium hypochlorite that reacts in ammonia solution to form chloroamine compounds (NH₂Cl) then reacts with phenolic reagents to form quinone monochlorin compounds so that they react with the remaining phenolic reagents to form blue indophenol compounds, after which the solution is measured using a UV-Visible Spectrophotometer with a wavelength of 640 nm. From the measurement results, calculations were then carried out on samples with codes 96 / LC, 97 / LC, 98 / LC,99/LC and 105/LC, mg/L; namely NH₃ levels of 4,9735 mg/L; 7,68985 mg/L; 1,967 mg / L; 5,0951 mg/L; and 4,1071mg/L . Based on the Regulation of the Minister of Environment No. 03 of 2010 concerning wastewater quality standards for industrial areas, liquid waste with sample codes 96 / LC, 97 / LC, 98/LC, 99/LC and 105 / LC has met the requirements of the NH₃ quality standard with a maximum level of 20 mg / L.