2020/3/22 · ND = non detectable results in μg/mL2ml Clear Screw HPLC Vials Type II, III and NP Type II glass is de-alkalized soda-lime glass with higher levels of sodium hydroxide and calcium oxide.Type III is soda-lime glass - cannot be autoclaved.Type NP is a general-purpose soda-lime glass used where chemical durability and heat shock are not factors.