Distillation heads, adapters & columns

Every part of the setup has to fit the joint on your flask. NS 14/23 is common for small-scale work and NS 29/32 for larger flasks; the first number is the wide diameter of the cone in mm, the second its length. Heads and columns are offered in both, for example the Claisen head with NS 14/23 cone and the Claisen head with NS 29/32 cone. If parts with different joints must connect, use a reduction adapter rather than forcing a fit. Not sure what your flasks have? Send us a photo: sales@luminixhealth.com.

A distillation head is enough for a simple distillation, when the components boil far apart or you just want to remove a solvent. The Claisen head for distillation thermometers also gives you an extra neck, for a thermometer or a capillary. When boiling points lie closer together, a Vigreux column between flask and head gives better separation through its indentations. The Vigreux column without jacket, NS 14/23, 300 mm suits small batches. For higher boiling liquids, a jacketed version such as the Vigreux column with glass jacket, NS 29/32, 600 mm limits heat loss.

Loose ground-glass joints are meant for building or repairing apparatus. A glassblower fuses them onto tubes, flasks or custom parts, so the finished piece fits your standard glassware. They are available as sockets in sizes from NS 5/13 up to NS 45/40, for example the conical ground socket NS 14/23 and the conical ground socket NS 29/32. For a connection that must not seize, there is also the PTFE ground socket NS 29/32 with grip collar and sealing rings. For custom glass, describe your design and we will help: sales@luminixhealth.com.

A Liebig condenser, with a straight inner tube, is the standard for distillation: the condensate runs off freely towards the receiver. For reflux, an Allihn condenser with bulbs or a Dimroth condenser with an internal coil gives a larger cooling surface in the same length, so less vapour escapes. A Dimroth is the efficient choice for low-boiling solvents. Make sure the condenser's joints match your head or column. You will find all types in condensers. Need help choosing for a specific solvent? sales@luminixhealth.com.

A still head, an adapter or a column is the glass between the boiling flask and the condenser. A Vigreux or packed column gives the vapour a surface so a closer-boiling mixture can separate. The joint sizes at both ends have to match the flask and the condenser.

Distillation separates liquids by boiling point. A condenser turns the vapour back into liquid: Liebig, coil and cold-finger shapes differ in how much cooling surface they offer. A still head and a column sit between the flask and the condenser. A Soxhlet extractor washes a solid again and again with the same solvent. Ground joints have a standard size, and the joint, not the flask, is what has to match. The pieces are indexed under ISO laboratory glassware.

This shelf belongs to Distillation & extraction glassware, inside Labware. Luminix Health distributes this range for laboratory use.

The neighbouring shelves are Condensers, Ground-joint glassware (other) and Soxhlet & extraction apparatus. The category above this shelf is Distillation & extraction glassware.

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