Solutie tampon pH=4.01 WTW108800 250ml 4*106=424 Solutie tampon pH=7 WTW108802 250ml 4*106=424 Solutie tampon pH=10.01 WTW108805 250ml 4 *106=424 1015570500 Clorura de potasiu - solutie (nominal 0,147 mS/cm),material de referinta certificat pentru masurare conductivitate electrolitica (c=0.001 mol/l) Certipur®, Merck, 500 ml Buc 1 *766=766 1012030500 Clorura de potasiu - solutie (nominal 1.41 mS/cm), material de referinta certificat pentru masurare conductivitate electrolitica (c=0.01 mol/l) Certipur, Merck 500ml 1 *914=914 1012540500 Clorura de potasiu-solutie (nominal 12,8 mS/cm) material de referinta certificat pentru masurare conductivitate electrolitica (c=0.1 mol/l) Certipur Merck 500ml 1*914=914