Merck Buffer Solution (citric acid, sodium hydroxide, hydrogen chloride) traceable to SRM from NIST and PTB pH 2.00 (25°C) Certipur®
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Merck Titanium standard solution traceable to SRM from NIST (NH ) TiF in H O 1000 mg/l Ti Certipur®
Merck Buffer solution (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®
Merck Potassium iodate volumetric standard, secondary reference material for iodometry, trace able to NIST SRM Certipur®
Merck Silicon standard solution traceable to SRM from NIST acidic, (NH ) SiF in H O 1000 mg/l Si Certipur®
Merck Certified sec. standard reference buffer solution di-sodium tetraborate decahydrate, directly traceable to primary SRM from NIST/PTB pH(S) = 9.18 (25°C) Certipur®
Merck Samarium ICP standard traceable to SRM from NIST Sm O in HNO 2-3% 1000 mg/l Sm Certipur®
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 solution (citric acid/sodium hydroxide/hydrogen chloride) traceable to SRM from NIST and PTB pH 4.00 (25°C) Certipur®