20 ML EPA \ / TOC Standard Sample Vialik Vials Pre-Rulated me PTFE \ / Silicore Composite Septa. I loaʻa ma ke aniani a me ke aniani amber; E koho i nā hiʻohiʻona e pili ana i nā pahu lepo e kōkua i ka hoʻemiʻana i ka maʻi o waho, e hāʻawi ana i kahi hōʻailona kiʻekiʻe no ke kiʻekiʻe kiʻekiʻe.