Two types of high molecular weight hindered amine light stabilizers (HALS), CHIMASSORB® 944 and CHIMASSORB® 2020, as well as TINUVIN® 791, a mixture of high molecular weight HALS and monomer type HALS, were analyzed by Asahipak GF-310 HQ (an Aqueous/Organic (multi-solvent use) SEC column). Addition of organic amines such as triethylamine in the mobile phase helps the analysis of high molecular weight HALS.
Sample: 0.1% each, 100μL
Columns : Shodex Asahipak GF-310 HQ (7.5mmI.D. x 300mm) x 2 Eluent : 50mM Triethylamine in DMF Flow rate : 0.4mL/min Detector : Shodex RI Column temp. : 50°C