1 Potasiu chloride solution-CertipurConductivitate = 0,147 mS/cm 500 ml 2 Potasiu chloride solution CertipurConductivitate = 1,41 mS/cm 900 ml 3 Potasiu chloride solution CertipurConductivitate = 111 mS/cm 500 ml 4 Solutie de clorura de potasiu 0.015 mS/cm 5x100 ml 5 Buffer solution Ph=2 Certipur 500 ml 6 Buffer solution CertipurSol.Standard de pH=4.01(25 C °) 500 ml 7 Buffer solution CertipurSol.Standard de pH=7.00 500 ml 8 Buffer solution – Sol.standard de pH=9.21 250 ml(1 flacon) 9 Buffer solution CertipurSol.standard de pH=12 500 ml 10 Solutie standard de clorura de potasiu = 3mol/l 250 ml(1 flacon) 11 Nitrite standard solution 0.201±0.009 mg/l NO2-N 100 ml 12 Nitrite standard solution Certipur 0,01±0.0012 mg/l NO2 100 ML 13 Nitrite standard solution 1000 mg/l NO2 Certipur 500 ml(1 flacon) 14 Azotat de argint 0,02 mol/l (0,02N) solutie volumetrica 4 litri 15 Chloride standard solution 1000 mg/l ClCERTIPUR 500 ml 16 Chloride standard solution 10 mg/l CloruriCERTIPUR 100 ml 17 Clorura de sodium Certipur 80 g 18 Ammonium standard solution, conc=1000 mg/l NH4CERTIPUR 500 ml 19 Solutie standard de amoniu 0,4 mg/l NH4-N, CERTIPUR 100 ML 20 Amoniu standard sol CRM , 0.250 ±0.011mg/ NH4 2x100 ML 21 Citrate trisodic dihidrat 1 kg 22 Sodium salicilat 1 kg 23 Sodium nitroprusiat 25 g 24 Hidroxid de sodiu 1 kg 25 Calcium chloride 0.01M ( 0,02 N) 500 ML 26 Calcium standard solution1000 mg/l calciu 500 ml 27 EDTA disodic ( Tritriplex III) 250 g