Simultaneous determination of nitrate, nitrite and bromate by capillary zone electrophoresis in tea infusions grown in the Black Sea region of Turkey

A quick method for the simultaneous determination of nitrate, nitrite and bromate ions in tea infusions using capillary zone electrophoresis was developed. A three‐factor full factorial design was applied for the determination of optimal conditions. Prior to the full factorial analysis, a number of...

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Bibliographic Details
Published in:Separation science plus 2021-01, Vol.4 (1), p.45-53
Main Authors: Tembo, Zebron Nchimunya, Şeker Aygun, Fatma, Erdoğan, Behice Yavuz
Format: Article
Language:English
Subjects:
bromate
capillary zone electrophoresis
nitrate
nitrite
tea infusions
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Summary:A quick method for the simultaneous determination of nitrate, nitrite and bromate ions in tea infusions using capillary zone electrophoresis was developed. A three‐factor full factorial design was applied for the determination of optimal conditions. Prior to the full factorial analysis, a number of experiments were conducted. A 50 mM phosphate buffer solution with pH 3.5 was selected. A capillary temperature of 40 °C, −20 kV applied voltage, 61.5 cm total capillary length (53.5 cm effective length) with 50 μm i.d., and 50 mbar injection pressure for 30 s were used. The limits of detection for nitrate, nitrite, and bromate were 0.60, 0.99, and 2.14 mg/L, respectively. The anions could be detected by the method with good resolution within 7 min with average spike recovery ranging between 91.6 and 105.5% (n = 3).
ISSN:2573-1815
2573-1815
DOI:10.1002/sscp.202000074