BOD标准品 (analogous to EN 1899) for 10 x 1l standard solution 210 ± 20 mg/l Spectroquant®
折射率标准品 n=1.6160 1-Methyl-naphthalene/water, traceable to SRM from NIST and PTB n (20°C)=1,6160 CertiPUR®
折射率标准品 n=1.3915 2,2,4-Trimethyl-pentane/water, traceable to SRM from NIST and PTB n (20°C)=1,3915 CertiPUR®