分子筛 0.3nm rods ~ 1.6 mm (1/16)"
氢氧化钙 for the preparation of DIN 19266 pH standard buffer solutions
浓缩缓冲液 for 1000 ml of solution (phosphate), pH 7.20 Titrisol
30%过氧化氢 (Perhydrol )分析级 EMSURE ISO
氟离子 IC 标准液 1,000 mg/l NaF in H O 1000 mg/l F CertiPUR
UV-VIS 标准品 1a: 重铬酸钾溶液 (600 mg/l) for the absorbance at 430 nm according to Ph Eur
醋酸盐缓冲液 (acetic acid/sodium acetate) traceable to SRM from NIST and PTB pH 4.66 (20°C) CertiPUR
锰 ICP 标准液 1,000 mg/l traceable to SRM from NIST Mn(NO ) in HNO 2-3% 1000 mg/l Mn CertiPUR