New method for phosphoric acid determination virtually eliminates sample preparation for the non-carbonated samples, while the carbonated samples require only degassing prior to injection
The method for determining the phosphoric acid concentration and its precursors, in soft drinks, syrups and concentrates has been developed in close collaboration with the soft drinks industry.
A typical soft drink, eg Coca Cola, will have a mixture of water, sugar, caramel for colour, phosphoric acid (which gives the tartness), caffeine (a mild stimulant) and natural flavourings. The Metrohm 761SDE compact ion chromatography system is optimally adapted to the requirements of this analysis.
It requires only small amounts of environmentally friendly chemicals and time consuming sample preparation is a thing of the past.
The system is optimised for the analysis in that a specific eluent and column package is used.
The certified MPak eluents ensures quality and consistency of results, while the Metrohm MSM11 suppressor gives linear calibration through the range of interest, leaving the Metrosep column to provide phosphoric acid concentrations in a rapid chromatographic run.
The MCal standards assure trouble free calibration.
The final part of the system is the ICNet 2.3 software with IC Cap, which ensures easy operation and convenient data export.
This new soft-drink method for phosphoric acid determination virtually eliminates sample preparation for the non-carbonated samples, while the carbonated samples require only degassing prior to injection.
If one has a large throughput of test samples then we recommend automation the system using the 766 IC sample processor, which can process 127 samples.
