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CHÍNH SÁCH KHÁCH HÀNG
Ammonium standard solution 6.00 mg/l NH4-N ± 0.13 mg/l (100 ml)
Potassium chloride solution (nominal 111 mS/cm) certified reference material for the measurement of (500 ML)
Colour Reference Solutions R for testing the colour intensity acc. to Ph. Eur. R1-R7 CertiPUR (1 SET)
Potassium hydrogen phthalate Volumetric standard, secondary reference material for alkalimetry, traceable (80 G)
Potassium chloride solution (nominal 0.015 mS/cm) certified reference material for the measurement of (5 X 100 ML)
Potassium dihydrogen phosphate, di-Sodium hydrogen phosphate certified secondary standard reference (2 X 25 G)
Potassium tetraoxalate dihydrate certified secondary standard reference material for pH measurement; (25 G)
Potassium hydrogen tartrate certified secondary standard reference material for pH measurement; (25 G)
Buffer solution (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20°C) CertiPUR (1 L)
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