Merck Potassium iodate volumetric standard, secondary reference material for iodometry, trace able to NIST SRM Certipur®
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Merck Buffer solution (citric acid/sodium hydroxide/hydrogen chloride) colour: red, traceable to SRM from NIST and PTB pH 4.00 (25 °C)
Merck Erbium ICP standard traceable to SRM from NIST Er O in HNO 2-3% 1000 mg/l Er Certipur®
Merck Cerium ICP standard traceable to SRM from NIST Ce(NO ) in HNO 2-3% 1000 mg/l Ce Certipur®
Merck Buffer solution (Potassium tetraoxalate) traceable to SRM from NIST and PTB pH 1.68 (25°C) Certipur®
Merck Gallium ICP standard traceable to SRM from NIST Ga(NO ) in HNO 2-3% 1000 mg/l Ga Certipur®
Merck Tungsten standard solution traceable to SRM from NIST (NH ) WO in H O 1000 mg/l W Certipur®
Merck Lithium standard solution traceable to SRM from NIST LiNO in HNO 0.5 mol/l 1000 mg/l Li Certipur®
Merck Buffer solution (potassium hydrogen phthalate), traceable to SRM from NIST and PTB pH 4.01 (25°C) Certipur®
Merck Calcium ICP Standard traceable to SRM from NIST Ca(NO ) in HNO 2-3% 1000 mg/l Ca Certipur®