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TOTAL ACID AND BASE NUMBERS ~ NO LONGER A GRIMY / GREASY APPLICATION

12 Jan 2006

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More and more laboratories are turning to this comfortable automated system, in which the oil sees only the disposable sample beaker and everything else is taken care of automatically.

The determination of Total Base number (TBN) is indispensable to the oil industry. Nevertheless, until now most analysts normally hated this messy analysis because of the aggressive solvent mixtures used and the oil smeared titration beakers and the damage that these do to the instruments. This is why specially resistant materials have been used for this robotic analysis i.e. if a beaker should accidentally overflow with solvent this does not affect the polypropylene rack which is the heart of the wet chemistry system. Anybody who still uses the three electrode technique is behind the times. This time proven but clumsy indication set up has been reduced by us to a single electrode...the Solvotrode.

Depending on the application the Solvotrode can be filled with various electrolytes. This electrode , which has been specially designed for the determination of TBN & TAN (Total Acid Number) according to ASTM, is characterised by its rapid response, excellent shielding against electrostatic effects as well as the resulting stable measurements in organic solvents. The separable ground-joint diaphragm allows the Solvotrode to be thoroughly cleaned. The robotic TAN/TBN analyser includes a drip tray which protects both the 855 Robotic Titrosampler and the furniture against the oil/solvent mixtures. It is mounted beneath the rack used in this application, any spills are safely led into the waste container via tubing.

For further information please contact Metrohm UK Ltd.

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AutosamplersAutosamplers are automated sample loaders used with a number of separation and analytical techniques. HPLC autosamplers use automated partial or full-loop injection systems and place samples in vials or microplates for analysis. Autosamplers can also be used for elemental analysis. Features to consider include repeatability, syringe capacity, footprint and temperature controls.  ElectrophoresisElectrophoresis equipment is used to separate mixtures of protein, DNA or RNA, based on their electric charge, size and other physical characteristics, by passing them through a medium such as a polyacrylamide gel, an agarose gel or a capillary tube. Electrophoresis equipment includes horizontal and vertical gel electrophoresis chambers, isoelectric focusing systems, 2D electrophoresis and capillary electrophoresis instruments. Precast gels with a gradient can be used or gels can be hand cast. Samples are run alongside ladders or markers to identify the approximate size of a molecule. Separated proteins and nucleic acids in the gel can be stained or probed with fluorescent markers and then imaged and detected using gel documentation instruments, transilluminators, densitometers and scanners. Find the best electrophoresis equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.TitrationTitration is an analytical technique for determining substance concentration in a solution. For titration consider a manual or automated system, volumetric or coulometric reagent addition and indication by a potentiometer, spectrometer, turbidometer or by the Karl Fischer method. Other features of titration to consider include burettes, reagents, concentration range, reaction time and autosamplers.

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TOTAL ACID AND BASE NUMBERS ~ NO LONGER A GRIMY / GREASY APPLICATION