Has anyone any experience in analysing Chimassorb 944, Cyasorb 3346 and Chimassorb 119 in extracts of plastics by HPLC? Some column and solvent conditions would be warmly welcomed. The amino column with 97/3 acetonitrile/water was working but a new amino column is not doing the job. Possibly the old column was modified in some way with years of use. Any suggestions would be welcome.
Thanks in advance, and thanks to the people who run this site. Great job.