Determining Anions & Oxyhalides reliably at such low level requires an extremely stable baseline combined with low background conductivity. Metrohm IC using Sequential Suppressor and advanced Conductivity detector can achieve lowest detection limits with extremely good sensitivity, specificity & precision for all the Anions including Oxyhalides as per EPA 300.1 A&B.
Alternatively for lowest detection complying to ISO 11206 limit a UV detector can be used with Post column reactor for selective estimation of only Bromate down to 0.5 µg/l.