Burettes

A classic glass burette with stopcock is filled by hand and read at the meniscus; it is simple, accurate and suits most titrations, such as the class AS burette, 25 ml, PTFE stopcock. An automatic burette sits on a reservoir bottle and fills itself, which saves time and limits contact with the titrant in routine series; spare parts like the 1000 ml spare bottle for titrating burettes of 25–50 ml are available. A digital burette dispenses by motor and shows the volume on a display, as with the digital burette with magnetic stirrer. Advice: sales@luminixhealth.com.

Class A and class AS burettes have the same tight volume tolerance; AS burettes are designed for faster delivery, so you titrate quicker without losing accuracy. Some carry the DE-M mark and come with a batch certificate, like the class AS burette, 10 ml, 0.02 ml divisions, made to ISO 385 per the product data. Class B burettes have a wider tolerance and suit teaching and routine work where top accuracy is not needed, for example the Schellbach burette, 100 ml, class B, side stopcock. Need certificates? Ask sales@luminixhealth.com.

Choose a burette so that a typical titration uses a good part of its volume, but never more than one filling: refilling mid-titration adds error. 25 ml and 50 ml burettes cover most routine work, and 10 ml burettes with finer divisions suit small sample amounts or dilute titrants. Examples are the class AS burette, 10 ml, 0.02 ml, the compact burette, 25 ml, 0.1 ml, Schellbach stripe and the class AS burette, 50 ml, 0.1 ml. Adjust the titrant concentration so consumption falls in that range. Questions: sales@luminixhealth.com.

Use amber glass for light-sensitive titrants, such as silver nitrate, potassium permanganate, iodine and thiosulphate solutions: the brown glass shields them from light during the titration. An example is the compact burette, class AS, amber glass, 25 ml, PTFE stopcock. Clear glass makes it easier to see the meniscus and any air bubbles, which helps with most other titrants, such as the class AS burette, clear glass, 25 ml. Spare amber burette tubes are also available, for example the amber glass burette tube, class B, 10 ml. Questions: sales@luminixhealth.com.

A burette delivers a measured volume through a stopcock, which is how a titration is read. Class A and class AS state the tolerance. The stopcock, glass or PTFE, and the volume of the burette are the choices. A dirty bore changes the delivered volume.

Volumetric glassware is glass that has been calibrated to contain or to deliver one stated volume at a reference temperature. That calibration is the whole point. Class A and class AS have a tighter tolerance than class B. A volumetric flask contains. A pipette and a burette deliver. A measuring cylinder is the coarser reading, used when the volume is not the result. The classes sit under ISO laboratory glassware. The chain back to the unit of volume is the work of the BIPM and of NIST.

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

The neighbouring shelves are Volumetric flasks, Measuring cylinders, Mixing cylinders and Volumetric accessories & certificates. The category above this shelf is Volumetric glassware.

Luminix Health distributes this range from the heart of Europe. We deliver across the EU in two to five days if in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. Send a quote request, contact the team, or read who we are. The full brand index is on shop by brand.

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