polypropylene snap/crimp micro vials combine the robustness of TPX PMP with the benefits of PP micro inserts.PP vial material was used for Ion analysis to avoid contamination by glass HPLC vials during analysis. polypropylene snap/crimp micro vials can be used in most standard gas and liquid chromatography autosamplers. These lightweight, economical vials are made from durable polypropylene which has good chemical resistance. Breakage is not an issue with plastic vials, and they are non-reactive with most sample chemistries. PP vials are ideal for samples where glass is not appropriate; as with samples that adhere to glass.