Aijiren Vials and Sample Containment Solutions Brochure. However, substandard vials, caps, and septa can lead to sample loss, has a high metal content that can remove compounds from the matrix. HPLC and GC. HPLC and GC Vials, Caps, Septas and Inserts Guide (Bestsellers . Mar 22, 2020 For some applications glass vials are not suitable due to ...