Merck Buffer Solution (citric acid/sodium hydroxide), traceable to SRM from NIST and PTB pH 6.00 (25°C) Certipur®

H₂O 'da 500 mg/L TOC 
100 ml/paket

Merck Potassium hydrogen tartrate certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S) = 3.63 / pH(S) = 3.55 (25°C) Certipur®

H₂O 'da 100 mg/L COD
100 ml/paket

Merck Tungsten standard solution traceable to SRM from NIST (NH ) WO in H O 1000 mg/l W Certipur®

Merck Buffer solution (boric acid/potassium chloride/sodium hydroxide), coloured: blue traceable to SRM from NIST and PTB pH 9.00 (20°C) Certipur®

Merck Barium ICP standard traceable to SRM from NIST Ba(NO ) in HNO 2-3% 1000 mg/l Ba Certipur®

0.5 mol/l 1000 mg/L Cd 
500 ml/paket

Merck Certified sec. standard reference buffer solution potassium dihydrogen phosphate/di- sodium hydrogen phosphate, directly traceable to primary SRM from NIST/PTB pH(S) = 6.86 (25°C) Certipur®

Merck di-Sodium oxalate volumetric standard, secondary reference material for redox titration, tra ceable to NIST Standard Reference Material (SRM) Certipur® Reag. USP

Merck Barium standard solution traceable to SRM from NIST Ba(NO ) in HNO 0.5 mol/l 1000 mg/l Ba Certipur®

Merck Rhenium ICP standard traceable to SRM from NIST NH ReO in H O 1000 mg/l Re Certipur®

H₂O 'da 40.0 mg/L NO₃-N
100 ml/paket