An anion chromatography with ultraviolet detection (IC/UV) method was developed to simultaneously measure NO3−, NO2−, and HS− concentrations in saline (pore)waters. This method achieves nanomolar detection limits without the need for a Cd/Cu reducing column and requires <100 μl volume of sample, making it ideal for use in porewaters, where high sulfide concentrations can be present. Bromide and iodide among other anions are also measurable by this technique because of their UV absorption properties. Sample filtration is the only sample treatment required before analysis.