1st hydrolytic class glass 51 expansion autosampler vials. autosampler glass vials from different sources. In this case 1st hydrolytic class tubes have been used with examples of 33, 51 and 70 expansion type raw glass tubes. • 1 mL 18MΩ HPLC water (Thermo Scientific™ Smart2Pure™ system (P/N 50129845)) was added to the 2 mL vial and