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

H₂O 'da 200 mg/L COD

2 mol/l 1000 mg/L Sb
500 ml/paket

Merck Potassium tetraoxalate dihydrate certified secondary standard reference material for pH measurement; directly traceable to primary reference material from NIST/PTB pH (S) = 1.67 (25°C) Certipur®

0.5 mol/l 1000 mg/L V 
500 ml/paket

H₂O 'da 2.50 mg/L N
100 ml/paket

Merck Water Standard 0.01 % Certified Reference Material for Karl Fischer Titration 1 g 0.1 mg H O Aquastar®

2 mol/l 1000 mg/L Sb
100 ml/paket

Merck Buffer solution (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 2.00 (20°C) Certipur®

10.0 mg/L TOC
100 ml/paket

2 mol/l 1000 mg/L Au 
100 ml/paket

Merck Beryllium standard solution Be O(C H O ) in HNO 0.5 mol/l 1000 mg/l Be Certipur®

Merck Sodium carbonate volumetric standard, secondary reference material for acidimetry, traceable to NIST SRM Certipur®