Merck Buffer solution (boric acid/potassium chloride/sodium hydroxide solution), traceable to S RM from NIST and PTB pH 9.00 (25°C) Certipur®

H₂O 'da 50 mg/L Clˉ 
100 ml/paket

Merck Water standard oil Certified Reference Material for Karl Fischer Titration (oil matrix 15- 30 ppm H2O) Aquastar®

H₂O 'da 10.0 mg/L NO₃
100 ml/paket

H₂O 'da 40 mg/L SO₄
100 ml/paket

Merck Buffer solution (boric acid/potassium chloride/sodium hydroxide), traceable to SRM from NIST and PTB pH 10.00 (20°C) Certipur®

0.5 mol/l 1000 mg/L Si 
100 ml/paket

0.5 mol/l 1000 mg/L As
100 ml/paket

Merck Rhodium standard 10 mg/l (Rhodium(III) nitrate in nitric acid 0.5 mol/l) internal standard for ICP-MS

Merck Tantalum ICP standard traceable to SRM from NIST (NH ) TaF in H O 1000 mg/l Ta Certipur®

Merck Buffer solution (di-sodium tetraborate) traceable to SRM from NIST and PTB pH 9.18 (25°C) Certipur®

Merck Calcium carbonate volumetric standard, secondary reference material for complexometr y, traceable to NIST Standard Reference Material (SRM) Certipur® Reag. USP

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®