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.
Typical chromatograms of five pyrethroids in oral qutanling liquids under optimum conditions: (1) transfluthrin, (2) fenpropathrin, (3) fenvalerate, (4) etofenprox, and (5) silafluofen. In chromatograms (a, c, d), the spiked levels are 100, 20, and 0 ng mL−1, and (b, e) show the standard solution in blank matrix and acetonitrile.
