Metrohm's 859 Titrotherm thermometric titration system can tightly control sulphate levels in phosphoric-acid production.
With world food production at record levels and demand for crop-derived biofuels rising sharply, the production of phosphate-based fertilisers is booming.
A crucial factor in the production of phosphoric acid is the control of sulphate.
The previous methods have either been too slow and difficult to perform (classical gravimetry) or inaccurate and subject to interference (nephelometry).
Titrotherm's simple thermometric titration with barium chloride is fast and meets industry requirements for precision and accuracy.
Titrations are generally complete within 30 seconds.
The method is suitable for automation with a Metrohm 814 sample processor.
