DETERMINATIONOF TRACE NITRITEAS 4-(4-NITROBENZENAZO)- 1-AMINONAPHTHALENE COMPLEX BY EXTRACTION-5PECTROPHOTOMETRY Metode Penentuan Nitrit sebagal Kompleks 4-(4-Nitrobenzenazo)-1-Amlnonafta/en secara .. - Perpustakaan UGM, i-lib ([Yogyakarta] : Universitas Gadjah Mada, 2009)