Merck 109434 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 3.00 (20°C)

Merck 109435 Buffer solution (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 4.00 (20°C) Certipur®

Merck 119789 Manganese standard solution traceable to SRM from NIST Mn(NO₃)₂ in HNO₃ 0.5 mol/l 1000 mg/l Mn Certipur®

Merck 119778 Calcium standard solution traceable to SRM from NIST Ca(NO₃)₂ in HNO₃ 0.5 mol/l 1000 mg/l Ca Certipur®

Merck 170301 Aluminium ICP standard traceable to SRM from NIST Al(NO₃)₃ in HNO₃ 2-3% 1000 mg/l Al Certipur®

Merck 109884 Buffer concentrate (citrate/hydrochloric acid), traceable to SRM of NIST and PTB for 500 ml buffer solution, pH 4.00 ± 0.02 (20°C) Titrisol®

Merck 170230 Potassium standard solution traceable to SRM from NIST KNO₃ in HNO₃ 0.5 mol/l 1000 mg/l K Certipur®

Merck 101203 Potassium chloride solution (nominal 1.41 mS/cm) certified reference material for the measurement of electrolytic conductivity (c=0.01 mol/l) Certipur®

Merck 170353 Sodium ICP standard traceable to SRM from NIST NaNO₃ in HNO₃ 2-3% 1000 mg/l Na Certipur®

Merck 119500 Boron standard solution traceable to SRM from NIST H₃BO₃ in H₂O 1000 mg/l B Certipur®

Merck 119796 Selenium standard solution traceable to SRM from NIST SeO₂ in HNO₃ 0.5 mol/l 1000 mg/l Se Certipur®

Synonyms: Selenium standard for aqueous matrices ready foruse

Merck 170385 Sulfur ICP standard traceable to SRM from NIST H₂SO₄ in H₂O 10000 mg/l S Certipur®

Merck 119812 Ammonium standard solution traceable to SRM from NIST NH₄Cl in H₂O 1000 mg/l NH₄ Certipur®

Merck 111355 ICP multi-element standard solution IV (23 elements in diluted nitric acid) 1000 mg/l: Ag, Al, B, Ba, Bi, Ca, Cd, Co, Cr, Cu, Fe, Ga, In, K, Li, Mg, Mn, Na, Ni, Pb, Sr, Tl, Zn Certipur®

Synonyms: Nota 1 A

Merck 109409 Buffer solution (boric acid/potassium chloride/sodium hydroxide)traceable to SRM from NIST and PTB pH 10.00 (25°C) Certipur®

Merck 109477 Buffer solution (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), colour: green traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®

Merck 109461 Buffer solution (boric acid/potassium chloride/sodium hydroxide), traceable to SRM from NIST and PTB pH 9.00 (20°C) Certipur®