Details

Autor(en) / Beteiligte

• Pham, Hong Ngoc
• Luong, My Hoa
• Nguyen, Dinh Thi
• Nguyen, Quang Khanh
• Hoang, Quoc Anh
• Sai, Cong Doanh
• Thuy Ung, Thi Dieu
• Pham, Bach
• Huong Nguyen, Thi Anh
• Pham, Duc Thang
• Mai Pham, Thi Ngoc

Titel

Development of fluorescence nanosensor based on “off-on” effect of graphitic carbon nitride - gold nanoparticles system for amikacin quantification

Ist Teil von

• Materials chemistry and physics, 2024-01, Vol.311, p.128562, Article 128562

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• A graphitic carbon nitride functionalized gold nanoparticles (g-C3N4/AuNPs) based fluorometric assay was developed for simple and rapid on-site amikacin determination. g-C3N4 fluorescence is reduced (turn-off) when they bind to AuNPs but recovers (turn-on) when amikacin binds to AuNPs and releases the g-C3N4. The assay is based on the effective property of AuNPs as absorbers in inner filter effect (IFE) systems. Under optimized conditions of 25 mM Na2SO4, pH 6.0, 3.0 mg mL−1 g-C3N4, and incubation time of 12 min, the proposed method achieved a low detection limit of 5 × 10−9 M (2.9 ppb), wide linear range from 10−8 to 10−6 M, high precision (RSD <5 %) and high selectivity over other ions including Ca2+, Mg2+, Fe2+, NO3−, and PO43− as well as several antibiotics, namely naproxen, levofloxacin, vancomycin, ceftriaxone, amoxicillin. The fluorometric sensor based on g-C3N4/AuNPs has produced good agreement quantifying amikacin in pharmaceutical samples, as cross-checked with LC-MS/MS method. The developed fluorometric sensor is promising for rapid on-site detection of other organic and inorganic substances with high sensitivity, selectivity, and minimal reagent consumption. •g-C3N4/AuNPs were synthesized and confirmed by XRD, IR, UV–Vis, TEM and SEM/EDS.•The recovery in fluorescence intensity of g-C3N4/AuNPs witnessed a linear increase with amikacin concentration.•A large linear range from 10−8 to 10−6 M, high accuracy, selectivity and low LOD of 5 × 10−9 M (2.9 ppb) of amikacin.•The proposed method was successfully applied for amikacin determination in pharmaceutical samples.