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Merck Buffer solution (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 2.00 (20°C) Certipur®
Merck Mercury ICP standard traceable to SRM from NIST Hg(NO ) in HNO 10% 1000 mg/l Hg Certipur®
Merck Buffer solution (boric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 8.00 (20°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 Calcium ICP Standard traceable to SRM from NIST Ca(NO ) in HNO 2-3% 1000 mg/l Ca Certipur®