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CHÍNH SÁCH KHÁCH HÀNG
Aquamerk Total hardness in freshwater Range/graduation 1 drop = 17.8 mg/l CaCO3 (50 TESTS)
Potassium chloride solution (nominal 111 mS/cm) certified reference material for the measurement of (500 ML)
Potassium chloride solution (nominal 1.41 mS/cm) certified reference material for the measurement of (500 ML)
Buffer solution (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20°C) CertiPUR (1 L)
Potassium hydrogen phthalate certified secondary standard reference material for pH measurement; (25 G)
Potassium hydrogen phthalate Volumetric standard, secondary reference material for alkalimetry, traceable (80 G)
Calcium hydroxide for the preparation of DIN 19266 pH standard buffer solutions, pH : 12.45 (25 G)
Potassium tetraoxalate dihydrate certified secondary standard reference material for pH measurement; (25 G)
2-Propanol standard for the analysis of tobacco (2.5 L)
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