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乳中のオキシテトラサイクリン検出のためのコロイドAg₂S量子ドットに基づく発光センサー
T S Kondratenko1, M S Smirnov1, I G Grevtseva1
1Voronezh State University, 1 Universitetskaya Sq., 394018, Russia.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|February 11, 2026
まとめ
新規の硫化銀量子ドット(Ag2S QD)を用いた発光センサーは、生乳中のオキシテトラサイクリン(OTC)を効果的に検出します。このセンサーは、乳製品中の抗生物質残渣分析のための高感度で信頼性の高い方法を提供します。
科学分野:
- 材料科学
- 分析化学
- バイオテクノロジー
背景:
- 生乳中のオキシテトラサイクリン(OTC)のような抗生物質残渣の正確な検出は、食品安全にとって重要です。
- 既存のOTC検出方法には、感度が低い、または複雑なサンプル前処理が必要な場合があります。
- 発光センサーは、迅速かつ高感度な分析対象物検出のための有望な代替手段を提供します。
研究 の 目的:
- 生乳中のオキシテトラサイクリン(OTC)検出のための発光センサーを開発・特性評価すること。
- Ag2S/L-Cys QDの発光消光に基づくセンシングメカニズムを調査すること。
- 実用化のためのセンサー性能パラメータを評価すること。
主な方法:
- L-システイン(L-Cys)で不動態化されたコロイド硫化銀量子ドット(Ag2S QD)の合成。
- OTC検出のための725 nmでのAg2S/L-Cys QDの発光消光を利用しました。
- OTCとQD間の電荷移動錯体形成に基づくセンサーメカニズムを提案しました。
主要な成果:
- センサーはOTC存在下で効果的な発光消光を示しました。
- 検出限界(LOD)0.53μM、定量限界(LOQ)1.16μM、線形範囲0-20μMのセンサーパラメータを確立しました。
- 生乳分析のための既存の発光センサーと同等の性能を達成しました。
結論:
- 開発されたAg2S/L-Cys QDベースの発光センサーは、生乳中のOTC検出のための実行可能なツールです。
- センサーメカニズムは、OTCとQD表面間の特異的な相互作用に依存します。
- センサーの感度と線形範囲は、乳製品における実用的な抗生物質残渣モニタリングの要件を満たしています。
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