Chromatography
Description
Utilizing a chromatographic column for separation and a conductivity cell for detection, common inorganic anions in solution are routinely determined on this instrument. Working detection limit for these ions is 0.01 mg/L. Additional columns are available to determine more complex ions in solution. A UV/Vis detector is also available to determine small groups of organic species in solution such as: alcohols, carboxylic acids, amines.
Rates
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Typical Applications
- anion studies in stream waters
- acid mine drainage
MCL instrumentation
- Dionex Ion Chromatograph (IC) 2010i (MRL Bldg.)
- Dionex 100 Ion Chromatograph (Hosler Bldg.)
- Equipped with an Ionpac AS4A-SC column for the anions: fluoride, chloride, nitrite, bromide, nitrate, phosphate, and sulfate (in order of appearance).
- ASRS-I Suppressor Column for better background levels.
- Linked with a computer for data processing.
Specifications
- Ions detected: F-, Cl-, NO2-, Br-, NO3 -, PO43-, SO42-
- Sensitivity: 0.01 mg/L
- Quantitative: Yes, with standards
Sample requirements
- Samples containing visible particulate matter must be filtered before injection into instrument.
- Strong matrices (e.g. seawater) should be avoided.
- Typically about 2-3 ml of sample solution is required.