TY - JOUR T1 - Modern directions for potentiometric sensors JO - Journal of the Brazilian Chemical Society A1 - Bakker, Eric A1 - Chumbimuni-Torres, Karin SN - 0103-5053 UL - 10.1590/S0103-50532008000400003 VL - 19 Y1 - 2008 PB - Brasil ER -