Mesoporous graphitic carbon nitride as an efficient sorbent for extraction of sulfonamides prior to HPLC analysis

Jing Zhang, Wenqi Li, Wenli Zhu, Yixin Yang, Peige Qin, Qian Zhou, Minghua Lu*, Zongwei CAI

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

44 Citations (Scopus)


Mesoporous graphitic carbon nitride (MCN) is shown to be a viable sorbent for the enrichment of sulfonamides (SAs). To overcome the difficulty of separating the sorbent from the matrix, a novel type kind of column-assisted dispersive solid-phase extraction (CA-dSPE) method was designed. The MCN was characterized by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction, fourier transform infrared spectroscopy and nitrogen adsorption-desorption measurements. The amount of sorbent, the pH value of the sample, the adsorption time, type and volume of the eluent and desorption time were optimized. The SAs were eluted from the sorbent with elution solvent of methanol containing 10% (v/v) ammonia and then submitted to HPLC analysis. Under the optimized conditions, the limits of detection for the SAs investigated (sulfadiazine, sulfameter, sulfachloropyridazine, sulfabenzamide and sulfadimethoxine) range from 20 to 5 pg·mL −1 . Satisfactory recoveries were obtained for spiked environmental water (90.1–110.5%) and milk samples (82.3–102.7%), with relative standard deviations of 0.5–3.8% and 1.1–4.4%, respectively. The method is simple, time saving and sensitive. [Figure not available: see fulltext.]

Original languageEnglish
Article number279
JournalMicrochimica Acta
Issue number5
Publication statusPublished - 1 May 2019

Scopus Subject Areas

  • Analytical Chemistry

User-Defined Keywords

  • Antibiotic analysis
  • Column assisted dispersive solid-phase extraction
  • DAD detector
  • Environmental water
  • High performance liquid chromatography
  • Mesoporous material
  • Milk sample
  • Sample pretreatment
  • Sensitive detection
  • Ultratrace analysis


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