Nonhlazeko Loveday Nxumalo, Lawrence Mzukisi Madikizela, Hendrik Gert Kruger, Stanley Chibuzor Onwubu and Phumlane Selby Mdluli 2020. Development of a paper-based microfluidic device for the quantification of ammonia in industrial wastewater. Water SA. 46, 3 July (Jul. 2020). DOI:https://doi.org/10.17159/wsa/2020.v46.i3.8661.