Gama EM, Pereira Matos R, Silva e Castro Moraes B. APPLICATION OF AMBERLITE XAD-2 RESIN FUNCTIONALIZED WITH CHROMOTROPIC ACID IN A SYSTEM FOR PRE-CONCENTRATION AND DETERMINATION OF COPPER AND ZINC IN FRUIT JUICE. RECIMA21 [Internet]. 2022 Jul. 26 [cited 2024 May 19];3(7):e371675. Available from: https://recima21.com.br/index.php/recima21/article/view/1675