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

Tembo Z. N., Seker Aygun F., Yavuz Erdoğan B.

SEPARATION SCIENCE PLUS, cilt.4, sa.1, ss.45-53, 2021 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 4 Sayı: 1
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1002/sscp.202000074
  • Dergi Adı: SEPARATION SCIENCE PLUS
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus
  • Sayfa Sayıları: ss.45-53
  • Anahtar Kelimeler: bromate, capillary zone electrophoresis, nitrate, nitrite, tea infusions, HERBAL TEA, WATER, VEGETABLES, SEPARATION, BROMIDE, SAMPLES, ANIONS, IODIDE
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

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 degrees C, -20 kV applied voltage, 61.5 cm total capillary length (53.5 cm effective length) with 50 mu m 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).