1 Solutie standard clorura de potasiu 0,001 mol/l pt conductivitate 0,147 mS/cm trasabila la PTB-NIST, Certipur Merck sau echivalent 1015570500 - Clorura de potasiu - solutie (nominal 0,147 mS/cm), material de referinta certificat pentru masurare conductivitate electrolitica (c=0.001 mol/l) Certipur®, flacon 500ml, Merck flacon 500 ml 1 657,66 lei
2 Amoniu-solutie standard MRC 0,25 mg/l NH4 in apa, trasabil la NIST, Merck s...
1 Solutie standard clorura de potasiu 0,001 mol/l pt conductivitate 0,147 mS/cm trasabila la PTB-NIST, Certipur Merck sau echivalent 1015570500 - Clorura de potasiu - solutie (nominal 0,147 mS/cm), material de referinta certificat pentru masurare conductivitate electrolitica (c=0.001 mol/l) Certipur®, flacon 500ml, Merck flacon 500 ml 1 657,66 lei
2 Amoniu-solutie standard MRC 0,25 mg/l NH4 in apa, trasabil la NIST, Merck sau echivalent 1322270100 - Soluţie standard amoniu, CRM trasabil la SRM de la NIST 0,250 mg/l NH₄ în H₂O, flacon 100ml, Merck flacon 100 ml 1 182,57 lei
3 Nitrat - solutie standard MRC, 10 mg/l NO3 in apa, trasabil la NIST, Merck sau echivalent 1322410100 - Soluţie standard azotat, CRM, trasabil la SRM de la NIST 10,0 mg/l NO₃ în H₂O 2,26 mg/l NO₃-N în H₂O, flacon 100ml, Merck flacon 100 ml 1 186,45 lei
4 Solutie standard de Amoniu trasabila la SRM from NIST, NH4Cl in apa, 1000mg/l Certipur, Merck 1198120500 - Solutie standard de amoniu NH₄Cl in H₂O trasabila NIST 1000 mg/l NH₄ Certipur® flacon 500 ml 1 127,26 lei
5 Solutie standard de Nitrat trasabila la SRM from NIST, NaNO3 in apa, 1000mg/l NO3 Certipur, Merck 1198110500 - Solutie standard de azotat NaNO₃ in H₂O trasabila NIST 1000 mg/l NO₃ Certipur®, flacon 500ml, Merck flacon 500 ml 1 127,26 lei
6 Solutie standard de calciu trasabila la SRM - NIST, Ca(NO3)2 in HNO3 1000mg/l Ca, Certipur, Merck sau echivalent. 1197780500 - Solutie standard de calciu Ca(NO₃)₂ in HNO₃ 0.5 mol/l, trasabila NIST; 1000 mg/
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