Sensitive SERS assay for glyphosate based on the prevention of l-cysteine inhibition of a Au-Pt nanozyme

Ma J., Feng G., Ying Y., Shao Y., She Y., Zheng L., ...Daha Fazla

ANALYST, cilt.146, sa.3, ss.956-963, 2021 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 146 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1039/d0an01919d
  • Dergi Adı: ANALYST
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, EMBASE, Food Science & Technology Abstracts, MEDLINE, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.956-963
  • Atatürk Üniversitesi Adresli: Evet

Özet

Herein, an indirect SERS sensing assay was developed for the determination of glyphosate (Gly) in tap water. The mechanism of detection was based on relieving the inhibitory effect of l-cysteine (l-cys) on a Au-Pt nanozyme by combining Gly with l-cys through divalent copper ions (Cu2+). In this method, a novel nano-chain-like Au-Ag composite with good repeatability was successfully fabricated to detect SERS signals of oxTMB without disturbing TMB Raman signals. Under optimal conditions, the SERS signal intensity of oxTMB (at 1605 cm(-1)) was proportional to the concentration of Gly. The results showed a good linear response over the concentration ranges of 10 mu g L-1 to 1000 mg L-1. The limit of detection and limit of quantitation of Gly were found to be 5 mu g L-1 and 10 mu g L-1, respectively. In addition, good anti-interference ability against interfering cations and structural analogues deserves to be mentioned. This SERS assay can be used for detection of Gly in tap water that can meet the needs of practical detection.