铵缓冲液 for complexometry (ammonium chloride/ammonia) pH = 10-11 TitriPUR®
缓冲溶液 for Karl Fischer Titration apura®
缓冲溶液 for Karl Fischer Titration apura®
缓冲剂 (Disodium tetraborate), tracable to SRM from NIST and PTB pH 9.18 (25°C) CertiPUR®
缓冲剂 (Citric acid, Sodium hydroxide, Hydrogen chloride), tracable to SRM from NIST and PTB pH 2.00 (25°C) CertiPUR®
缓冲液 traceable to SRM from NIST and PTB 10 x pH 4.01 (phthalate)m 10 x pH 7.00 (phosphate) 10 x pH 10.00 (borate) pH 4.01/pH 7.00/pH 10.00 (25°C) CertiPUR®