著者

Ildikó V. TÓTH Inês C. SANTOS Cláudia F. M. AZEVEDO Jorge F. S. FERNANDES Ricardo N. M. J. PÁSCOA Raquel B. R. MESQUITA António O. S. S. RANGEL

出版者

(社)日本分析化学会

雑誌

Analytical Sciences (ISSN:09106340)

巻号頁・発行日

vol.29, no.5, pp.563-570, 2013-05-10 (Released:2013-05-10)

参考文献数

30

被引用文献数

3 5

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In this work, aiming to develop a simple, inexpensive method for the determination of low bromate levels in water samples, a liquid waveguide capillary cell (LWCC) was coupled to a FIA system. The long optical path (100 cm) of the LWCC was used to improve the sensitivity and the limit of detection without resorting to any off-line or in-line preconcentration processes. The spectrophotometric determination was based on the oxidation of chlorpromazine by bromate in an acidic medium, resulting in the formation of a colored radical product. Sulfamic acid was added to the reagent for minimizing the interference of nitrite, and a chelating ion exchange resin was used to remove major cationic interferences. The developed system allowed the determination of bromate within the range between 1 – 20 μg L−1 with a detection limit of 0.2 μg L−1.