Simultaneous on-site screening of four prohibited anti-inflammatory drugs in herbal tea by a multiplex lateral flow immunoassay
摘要
A rapid and sensitive multiplex lateral flow immunoassay (LFIA) was developed using high-brightness latex microspheres (LMs), which can simultaneously detect paracetamol, phenacetin, antipyrine, and prednisone acetate in herbal tea within 10 min. Under optimized experimental conditions, this LMs-LFIA can detect the four analytes at concentrations as low as 6.4 ng/mL, 0.38 ng/mL, 0.026 ng/mL, and 4.6 ng/mL, with low cut-off values (200 ng/mL, 200 ng/mL, 160 ng/mL, 160 ng/mL, respectively). Besides, this work demonstrated high specificity (no cross-interferences), good reproducibility (˂7.50%), acceptable stability (60 days) and high recoveries (90.2% − 118.1%) in spiked herbal samples. Importantly, in the blind sample analysis, of the developed LMs-LFIA showed good agreement with the validated LC-MS/MS method, suggesting high accuracy and practicability. This work provides a robust tool for highly efficient monitoring of common illegally added anti-inflammatory drugs in herbal teas.
Graphical abstract