ToC vials yog pre-huv cov thawv ntim ua los ntawm cov iav zoo borosilicate iav lossis lwm cov khoom siv inert. Lawv tshwj xeeb yog tsim kom muaj kev phom sij me me uas cuam tshuam nrog cov kev pheej hmoo, kom muaj cov organic impurities tsis sket cov organic impurities tsis skeet cov organic impurities tsis sken cov toc nyeem.