苯甲酸 分析级 EMSURE Reag. Ph Eur

硫酸钠 anhydrous 99.99 Suprapur

面议

镓 ICP 标准液 1,000 mg/l traceable to SRM from NIST Ga(NO ) in HNO 2-3% 1000 mg/l Ga CertiPUR

面议

金 ICP 标准液 1,000 mg/l traceable to SRM from NIST H(AuCl ) in HCl 7% 1000 mg/l Au CertiPUR

面议

缓冲剂 (di-sodium tetraborate), traceable to SRM from NIST and PTB pH 9.22 (20°C) CertiPUR

面议

磷酸二氢钾溶液 (buffer stock solution) 1/ mol/l

面议

缓冲液 (citric acid/sodium hydroxide/hydrogen chloride), traceable to SRM from NIST and PTB pH 4.00 (20°C) CertiPUR

面议

锆 ICP 标准液 10,000 mg/l traceable to SRM from NIST ZrOCl in HCl 10% 10000 mg/l Zr CertiPUR

面议

缓冲液 (Citric acid/Sodium hydroxide/Hydrogen chloride) colour: red, traceable to SRM from NIST and PTB pH 4.00 (20 °C) CertiPUR

面议