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

Merck Tris(hydroxymethyl)aminomethane volumetric standard, secondary reference material for acidimetry, traceable to NIST Standard Reference Material (SRM) Certipur® Reag. Ph Eur,Reag. USP

Merck Sodium standard solution traceable to SRM from NIST NaNO in HNO 0.5 mol/l 1000 mg/l Na Certipur®

 0.5 mol/l 1000 mg/L Co
500 ml/paket

Merck Silicon ICP standard traceable to SRM from NIST (SiO in NaOH 4 %) 10000 mg/l Si Certipur®

H₂O 'da 500 mg/L TOC 
100 ml/paket

Merck Buffer solution (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20°C) Certipur®

Merck Potassium hydrogen phthalate Volumetric standard, secondary reference material for alkalimetry, traceable to NIST Standard Reference Material (SRM) Certipur® Reag. Ph Eur,Reag. USP

Merck Certified sec. standard reference buffer solution potassium tetraoxalate dihydrate, directl y traceable to primary SRM from NIST/PTB pH(S) = 1.67 (25°C) Certipur®

Merck Lactose Standard 5 % Certified Reference Material for Karl Fischer Titration Aquastar®

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

H₂O 'da 2.00 mg/l NH₄-N
100 ml/paket

H₂O 'da 50 mg/L Clˉ 
100 ml/paket