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Enhanced safety for the determination of sulfuric acid and oleum concentration with DSA 5000 M

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Enhanced Safety for the Determination of Sulfuric Acid and Oleum Concentration - .PDF file.
DSA 5000 M 08

Sulfuric acid, H2SO4, is a colourless and odourless oily liquid that is highly hygroscopic. Dissolving sulfur trioxide, SO3, in concentrated sulfuric acid results in a fuming solution called oleum (or fuming sulfuric acid). Sulfuric acid is widely used in the organic-chemical industry, such as the plastics industry and petrochemistry, in the production of phosphoric acid and fertilizers, and also in other industries, e.g. with metallic mordants or accumulators.

The production of sulfuric acid proceeds in several steps starting from sulfur dioxide SO2. Concentration determination for quality control and subsequently adjustment of process parameters is important in the production stage when concentrated sulfuric acid containing dissolved sulfur trioxide is diluted with water to the desired concentration.

A standard method for concentration determination is to titrate sulfuric acid or oleum with a base, commonly sodium hydroxide, NaOH. The acid sample has to be diluted prior to titration – a time-consuming and hazardous operation. The accuracy of the results is influenced by several factors, such as the skill of the operator, the quality of the standard base solution, the precision of the burettes, the quality of the indicator used, etc. In routine analysis accuracies of 0.1 to 0.5 % w/w H2SO4 can be attained.

The Anton Paar DSA 5000 M Density and Sound Velocity Meter uses an efficient method for concentration determination of sulfuric acid and oleum by combining two physical properties, namely density and sound velocity.

Anton Paar Ltd

Anton Paar develops, produces and distributes highly accurate laboratory instruments and process measuring systems, and provides custom-tailored automation and robotic solutions.

Visit our website +44 (0) 1992 514 730

Anton Paar develops, produces and distributes highly accurate laboratory instruments and process measuring systems, and provides custom-tailored automation and robotic solutions.

It is the world leader in the measurement of density, concentration and CO2 and in the field of Rheometry. Other areas of specialty are: Viscometry, Polarimetry, Refractometry, Microwave Sample Preparation & Synthesis, Chemical and Mechanical Surface and Nanostructure Analysis.

With over 2200 employees at the headquarters in Graz (Austria) and the 25 sales subsidiaries worldwide, Anton Paar ensure that their products live up to their excellent reputation. The core competence of the company – high-precision production – and close contact to the scientific community form the basis for the quality of Anton Paar’s instruments.

A strong sales network in more than 110 countries guarantees customers rapid support and answers to their application and service queries.

Innovation is the basis for progress and every year Anton Paar invests more than 20 percent of the annual turnover in R&D.

Anton Paar Limited, a subsidiary of Anton Paar GmbH, provides sales, application support and service to users across the UK and Ireland.

With an office in St Albans (UK) and Dublin (Ireland) and a team of over 30 dedicated employees, Anton Paar Limited aims to provide first-class service at every stage in the customer relationship, ensuring our products live up to their excellent reputation.

Anton Paar Ltd
Unit F, The Courtyard
St Albans
AL4 0LA
UK

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