Vials and Inserts
Technical Information: Materials, Vials and Insert Features
Worldwide Glass offers vials and inserts made from the following materials:
- Any silicate glass containing at least 5% of boric oxide is called Borosilicate Glass. The boric oxide makes the glass resistant to extreme temperatures and chemical corrosion. Type I borosilicate has the least pH shift of any glass. It is highly resistant to water, neutral and acid solutions, concentrated acids and acid mixtures, and to chlorine, bromine, iodine and organic substances. Its chemical resistance is superior to that of most metals and other materials, even during prolonged periods of exposure and at temperatures above 100°C. Type 1 clear borosilicate glass has a linear coefficient of expansion of 33. Type 1 amber borosilicate glass has a linear coefficient expansion of 51
- Polypropylene (PP) is recommended for one time use only with low vapor transmission. Polypropylene is a rigid plastic that is translucent or may be tinted to provide colored material. At room temperature, polypropylene exhibits excellent chemical resistance to acids, alcohols, and bases. Polypropylene is compatible with acetone, ethyl acetate, methanol, isobutyl alcohol, methanol, methylene chloride, and methyl ethyl ketone. Polypropylene is incompatible with cyclohexane, ethers, dichlorobenzene, pentanes, and trichlorobenzene. Gas, disinfectants or autoclave are recommended to sterilize products made of polypropylene. Lowest temperature use is -135°C.
- TPX (vials only) has a very low density and has greater transparency than polypropylene. It has excellent chemical resistance and low moisture absorption. TPX melts at approximately 235°C.
Neck Design (Finish)
Worldwide Glass Resources offers vials with the following finishes:
- The Shell Vial Finish is also called a Fire-Polished Neck, where the opening of the vial has the same dimensions as the walls of the vials.
- The Flat Crimp Finish is available in 11 mm for the 12x32 mm dimension, and in 20 mm for the headspace vials. Alternatively, a Tapered Crimp Finish is available in 20 mm for the headspace vials.
- The Snap Finish is available in 11 mm for the 12x32 mm dimension and is compatible with both crimp closures and PE snap closures.
- The 8-425, 10-425, and 13-425 Screw Thread Finishes are standard screw thread finishes as outlined by GPI. The threads run down to the shoulder of the vial. The 8-425 Screw Thread Finish is a Standard Opening, while 10-425 Screw Thread Finish is a Large Opening.
- The 9 mm Short Screw Thread finish is designed for use with robotic arm autosamplers. The threads do not run down to the shoulder of the vial.
- The 18 mm Screw Thread Finish is used in Headspace vials. The thread runs down to the shoulder of the vial.
Worldwide Glass Resources offers vials with the following bottom designs:
- Most vials are made with a Flat Bottom Design.
- Headspace vials are also available in a Radius Bottom Design, which offers more reliability when internal pressures build.
- Vials are also available with a High Recovery Bottom Design (HRV). The outer bottom is flat or has a radius, while the inner design is conical. These vials are designed for maximum sample recovery.
Worldwide Glass Resources offers inserts to fit Standard Opening Vials as well as Large Opening Vials
- 8-425 Screw Thread Vials use inserts with a 5 mm diameter.
- 9 mm Short Screw Thread Vials, Large Opening 11 mm Crimp Vials and Snap Vials, 10-425 Screw Thread Vials, and 13-425 Screw Thread Vials use inserts with a 6 mm diameter.
Worldwide Glass Resources offers inserts with the following bottom designs.
- Flat Bottom Inserts lay flat on the inner bottom of the vial.
- Conical Bottom Inserts are designed for greater sample recovery. The bottom point rests on the inner bottom of the vial. A PP Bottom Spring can be attached to a conical bottom insert to center the insert inside the vial and to prevent protect the autosamplers' needle from impact with the insert.