Silver nanoparticle-base lateral flow immunoassay for rapid detection of Staphylococcal enterotoxin B in milk and honey

Kuo Hui Wu*, Wen Chien Huang, Rong Hwa Shyu, Shu Chen Chang

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

26 Scopus citations

Abstract

A silver nanoparticle (AgNP)-based sandwich-type lateral flow immunoassay (LFIA) was evaluated for rapid detection of Staphylococcal enterotoxin B (SEB) in milk and honey. The role of trisodium citrate dihydrate (TSC) in the formation of Ag/TSC nanoparticles was established using UV–Vis spectroscopy. The association of silver with TSC in Ag/TSC nanoparticles was studied by the decrease in the intensity of anodic peak potential at 0.47 V and shift to 0.30 V in cyclic voltammetry (CV). The morphological, compositional and interaction studies of the AgNPs conjugated with the anti-SEB polyclonal antibody (Ag-sAb) was established using transmission electron microscopy (TEM) and X-ray photo electron spectroscopy (XPS) measurements. The visible detection limit and optical detection limit of the SEB test strip were 0.5 and 0.125 ppm, respectively, in SEB standard solution. This assay showed no cross-reaction with Staphylococcal enterotoxin A, Staphylococcal enterotoxin C or Salmonella typhi. Finally, the SEB test strip was effectively applied for the detection of SEB in spiked liquid milk and viscous honey, with optical detection limits of 0.25 and 0.5 ppm, respectively.

Original languageEnglish
Article number111163
JournalJournal of Inorganic Biochemistry
Volume210
DOIs
StatePublished - 09 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Inc.

Keywords

  • ImageJ software
  • Lateral flow immunoassay
  • Silver nanoparticle
  • Staphylococcal enterotoxin B

Fingerprint

Dive into the research topics of 'Silver nanoparticle-base lateral flow immunoassay for rapid detection of Staphylococcal enterotoxin B in milk and honey'. Together they form a unique fingerprint.

Cite this