Merck Buffer solutions (boric acid/potassium chloride/sodium hydroxide), traceable to SRM fro m NIST and PTB pH 11.00 (25°C) Certipur®

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 Fe
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®

Merck Buffer solutions traceable to SRM from NIST and PTB 10 x pH 4.01 (phthalate) 10 x pH 7.00 (phosphate) 10 x pH 9.00 (borate) pH 4.01/pH 7.00/pH 9.00 (25°C) Certipur®

 H₂O 'da 400 mg/L COD
100 ml/paket

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

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

 H₂O 'da 100 mg/L TOC
100 ml/paket

H₂O 'da 1.00 mg/L Mn
100 ml/paket

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

H₂O 'da 50.0 mg/l NH₄-N
100 ml/paket

H₂O 'da 6.00 mg/l NH₄-N
100 ml/paket