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Bromate Analysis Methods
Select which method to use
Drinking water municipalities routinely disinfect their water supplies to protect the public from potentially dangerous microorganisms. Chlorine dioxide, chloramine, and ozone are common disinfection treatments. These treatments produce byproducts that expose the public to potentially harmful chemicals.
For example, disinfecting with chlorine dioxide can generate the oxyhalide disinfection byproducts (DBPs) chlorite and chlorate, whereas the use of chloramine can produce chlorate. Although ozonation of water supplies is a particularly effective disinfection treatment, bromate may be generated if the source water contains elevated levels of naturally occurring bromide. These DBPs are probably carcinogenic and are considered dangerous.
Regulatory agencies have developed multiple ion chromatography (IC) methods for bromate analysis to suit different needs in sensitivity and instrumentation. The following table of application notes will help you select the method that’s best for your requirements. Choose between:
- Gradient, isocratic, postcolumn (ODA or KI) or 2D-IC methods
- Thermo Scientific™ Dionex™ IonPac™ Hydroxide columns:
- Thermo Scientific™ Dionex™ IonPac™ Carbonate columns:
In most cases, the hydroxide or carbonate eluent is generated electrolytically on Reagent-Free™ IC (RFIC™) systems to improve reproducibility and simplify analysis.
Methods Using Dionex IonPac AS19 Hydroxide Columns
Improved Sensitivity
Application Note | Dionex IonPac Column | Eluent | Employs | Application Note Demonstrates |
|---|---|---|---|---|
| AN 167 | Electrolytic hydroxide generation | Gradient method with suppressed conductivity detection | Trace Concentrations of Oxyhalides and Bromide in Municipal and Bottled Waters
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| AN 154 | Electrolytic hydroxide generation | Isocratic method with suppressed conductivity detection | Inorganic Anions in Environmental Waters
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| AN 168 | Electrolytic hydroxide generation | Postcolumn derivatization using o-dianisidine (ODA) to enhance detection | Trace Bromide in Drinking Water Using RFIC and Postcolumn Addition of o-Dianisidine
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| AN 171 | Electrolytic hydroxide generation | Postcolumn derivatization using potassium iodide (KI) to enhance detection |
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| AN 187 | Dionex IonPac AS19 (4mm) and AS24 (2mm) | Electrolytic hydroxide generation | 2D-IC with suppressed conductivity | Sub-μg/L Bromate in Municipal and Natural Mineral Waters
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Methods Using Dionex IonPac AS23 Carbonate Column
Higher Capacity Carbonate Column Changes Retention of Carbonate for Easier Bromate Analysis
Application Note | Dionex IonPac Column | Eluent | Employs | Application Note Demonstrates |
|---|---|---|---|---|
| AN 184 | Compares Dionex IonPac AS23 and AS19 | Electrolyic | Conductivity detection | Trace Chlorite, Bromate, and Chlorate in Bottled Natural Mineral Waters
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| AN 208 | Electrolytic carbonate/ | CRD-300 to reduce background noise | Bromate in Bottled Mineral Water Using the CRD 300 Carbonate Removal Device
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Methods Using Dionex IonPac AS9-HC Carbonate Column
Traditional Column in EPA Methods
Application Note | Dionex IonPac Column | Eluent | Employs | Application Note Demonstrates |
|---|---|---|---|---|
| AN 149 | carbonate | Postcolumn derivatization using potassium iodide (KI) to enhance detection | Sub-μg/L Bromate Analysis in Drinking Water Using an On-Line-Generated Postcolumn Reagent
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| AN 136 | carbonate | Postcolumn derivatization using o-dianisidine (ODA) to enhance detection | Trace Bromate Analysis in Drinking Water With Addition of a Postcolumn Reagent
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| AN 81 | carbonate | Direct Injection with suppressed conductivity detection | Trace Level Bromide Analysis by Direct Injection
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