This blog post features a recently published technical note that will be of interest to European laboratories testing for bromate in drinking water. The note features a solution for ISO Method 11206, which has some acceptance in Europe for determining bromate in drinking water, which is the result of drinking and bottled waters being disinfected with ozone. While ozone is highly effective and does not remain in the water or change its taste, it converts any bromide present during ozonation to bromate.
Bromate is recognized as a potential human carcinogen, which has led to its regulation in drinking and bottled waters. Major regulatory bodies worldwide (e.g., U.S. EPA and the European Commission) have set a maximum allowable bromate concentration in drinking water of 10 μg/L. In Europe, the limit was reduced to 3 μg/L for bottled natural mineral and spring waters disinfected by ozonation. In order to meet the 3 μg/L European maximum limit for bromate in natural mineral and spring waters disinfected by ozonation, ISO recently published a new standard, ISO Standard 11206.13.
Technical Note 116, Determination of Bromate by ISO Method 11206, (downloadable PDF) describes an alternate approach for a trace analysis of bromate using ion chromatography (Thermo Scientific Dionex ICS-5000 IC system) and an anion-exchange carbohydrate column (Thermo Scientific Dionex CarboPac™ PA1 column) in less than 18 min using isocratic conditions and detected by UV at 352 nm after derivatization. Our Chromatography Data System (CDS) software (Thermo Scientific Dionex Chromeleon 7.1 CDS) was used for data processing.
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By the way, the technical note has a great section on our methods and columns that have been embraced by standards organizations.
Do let us know in the Comments box if you are looking for a specific analyte in drinking water. Our application chemists will be pleased to hear from you.