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邻-苯二甲酸氢钾二级标准品 Volumetric standard, secondary reference material for alkalimetry, traceable to NIST Standard Reference Material (SRM) CertiPUR®
苯甲酸二级标准品 volumetric standard, secondary reference material for alkalimetry, traceable to NIST Standard Reference Material (SMR) CertiPUR®
碳酸钠二级标准品 volumetric standard, secondary reference material for acidimetry, traceable to NIST SRM CertiPUR®
氯化钠二级标准品 volumetric standard, secondary reference material for argentometry, traceable to NIST SRM CertiPUR®
草酸钠二级标准品 volumetric standard, secondary reference material for redox titration, traceable to NIST Standard Reference Material (SRM) CertiPUR®
碳酸钙二级标准品 volumetric standard, secondary reference material for complexometry, traceable to NIST Standard Reference Material (SRM) CertiPUR®
有机卤化物标准品 8-16 quality tests 0.2 - 2.0 mg/l Spectroquant®
品管查核 标准品 for checking the quality of photometric methods for ammonium, chloride, CSB, nitrate, phosphorus and sulfate Spectroquant®
品管查核 标准品 for checking the quality of photometric methods for ammonium, CSB and nitrogen Spectroquant®
