ION CHROMATOGRAPHY (IC) ANALYSIS of AQUEOUS SOLUTIONS
Analysis of halogens and Ions using Ion Chromatography
Ion Chromatography (IC) is an analytical technique that permits the dynamic separation and detection of anions in a solution. Aqueous samples are introduced through a sipper onto the column of the IC. Constituents of the sample pass through the column at a rate dependent upon their affinity to the stationary phase of the column. Components with a higher affinity are retained longer than those with little or no affinity. A detector at the end of the column measures the eluate as it exits the column.
Reporting limits – Most anions can be reported to ppb levels. (Detection limit is dependent on sample.) Accuracy: At the 10 ppb level anions can be determined within 15 %. At the 50 – 500 ppb level anions can be determined within 10%.
COMBUSTION BOMB PREP AND ANALYSIS OF COMBUSTIBLE MATERIALS (INCLUDING POLYMERS)
Solid combustible samples can be analyzed by IC by first digesting the sample in a Combustion Bomb, which drives the ions of interest into solution. An example would be bromine in plastics can be determined more easily than testing for all brominated fire retardants. A negative result indicates no brominated fire retardants are present.
- Fluoride (F-)
- Chloride (CI-)
- Bromide (Br-)
- Nitrate (NO2-)
- Nitrite (NO3-)
- Sulfate (SO4-2)
- Phosphate (PO4-3)
- Iodide (I)
- Acetate (CH₃COOH)
- Formate (CH₂O₂)
TYPICAL SAMPLES ANALYZED
- Plating Solutions
- Aqueous Solutions
- Extracts from sample surfaces
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