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Merck Water standard oil Certified Reference Material for Karl Fischer Titration (oil matrix 15- 30 ppm H2O) Aquastar®
Merck Buffer solution (boric acid/potassium chloride/sodium hydroxide) colour coded: blue, trac eable to NIST and PTB pH 10.00 (25°C) Certipur®
Merck Buffer Solution (di-sodium hydrogen phosphate/sodium hydroxide) traceable to SRM from NIST und PTB pH 12.00 (25°C) Certipur®
Merck Sodium standard solution traceable to SRM from NIST NaNO in HNO 0.5 mol/l 1000 mg/l Na Certipur®
Merck Chromium ICP standard traceable to SRM from NIST Cr(NO ) in HNO 2-3% 1000 mg/l Cr Certipur®
Merck Gold ICP standard traceable to SRM from NIST H(AuCl ) in HCl 7% 1000 mg/l Au Certipur®
Merck Zinc ICP standard traceable to SRM from NIST Zn(NO ) in HNO 2-3% 1000 mg/l Zn Certipur®
Merck Buffer solution (boric acid/potassium chloride/sodium hydroxide) traceable to SRM from NIST and PTB pH 10.00 (25°C) Certipur®
Merck Buffer solution (di-sodium tetraborate) traceable to SRM from NIST and PTB pH 9.18 (25°C) Certipur®