Dear che313
No doubt, Metrohm is best
. (that was my marketing based answer)
Your primary ions: nitrite, nitrate, sulfate, and prechlorate may be analyzed on IC with conductivity detetction. For sulfide and cyanide you will need an amperometric detector in addition. The two ions are detected e.g., in the DC mode (constant potential) at a silver electrode.
Depending on your needs you may get different system configurations (from all vendors).
With Metrohm you could start with a 882 Compact IC plus with a conductivity and an amperometric detector (for sequential use of conductivity and amperometric detection).
The upper end would be the 850 Professional IC with dual channel setup with addition sample preparation modules. Here an independent and parallel usage of the both detectors is possible.
Check with your local Metrohm representative or send me an e-mail (
lae@metrohm.com).