Liu Y-H, Cai Q, Ma W-X. Extraction and Determination of Nitrite using Ethanol-(NH4)2SO4 Aqueous Two-Phase System. ajc [Internet]. 2011 Jun. 9 [cited 2024 Jul. 23];23(9):4122-4. Available from: https://asianpubs.org/index.php/ajchem/article/view/10811