Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A) (a → l) UV-Vis spectra of AuNP solutions, AuNP solutions with concentrations of metsulfuron-methyl of 100 mg/L, 50 mg/L, 20 mg/L, 10 mg/L, 5.0 mg/L, 2.0 mg/L, 1.0 mg/L, 0.5 mg/L, 0.2 mg/L, 0.1 mg/L, and 0 mg/L in the presence of 2.0 mg/L melamine. Inset: photographic images of AuNPs solutions with various concentrations of metsulfuron-methyl. (B) Standard calibration curve of the absorbance change of AuNPs at 523 nm (ΔA523) against metsulfuron-methyl concentration.
