Larger peak areas, no injection peak, no carbonate peak, and baseline stability better than anything seen up until now are claimed for this advanced compact ion chromatography system
Metrohm says the 861 Advanced Compact IC represents a further extension to its range of compact ion chromatography (IC) instruments.
Since their introduction in 1999, this new instrument class has become firmly established, it says.
Extremely compact design, high sensitivity, low detection limits, comprehensive automation possibilities - all combined with very easy handling - form the basis for the outstanding performance and success of these IC systems.
In addition, excellent price-performance ratio and low running costs have opened up completely new application areas for ion chromatography.
An innovative step forward in the compact instruments sector: Metrohm introduces the 861 Advanced Compact IC with sequential suppression.
With values below 1uS/cm after suppression, the background conductivity approaches the theoretical limit of 0.05uS/cm.
When running anions, low background conductivity directly relates to very low detection limits, which means the compact ion chromatograph now covers the single-figure ppb range.
With the 861 Advanced Compact IC users experience a new type of chromatography, claims Metrohm: larger peak areas, no injection peak, no carbonate peak, and baseline stability better than anything seen up until now.
The 861 Advanced Compact IC combines the two most effective suppression techniques sequentially into a single instrument: namely, the second generation of the Metrohm Suppressor Module MSM II for chemical suppression, which coincides with a completely new development MCS, the 853 Metrohm CO2 suppressor.
This combination guarantees an accurate and reproducible analysis while representing an entirely new type of ion chromatography.
The removal of CO2 keeps the carbonate equilibrium from affecting the peak areas: with sample concentration and sample volume being the same, up to 50% larger peak areas and markedly lower detection limits are obtained.
No carbonate peak - this means no bothersome interferences during the quantification of certain analyte anions.
For example, on many polystyrene/divinylbenzene columns, chloride and carbonate coelute.
The use of the CO2 suppressor eliminates this problem.
The virtual absence of an injection peak improves the determination of rapidly eluting anions such as fluoride.
Although excellent separation between the injection peak and fluoride peak is achieved on polyalcohol columns, the use of the CO2 suppressor improves the detection limit even further.
As the injection peak is negligibly small, considerably larger sample volumes can be injected.
