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.
Comparison of the LOQ and linear dynamic range of verapamil with (a) silica coated paper (0.27 mm thick; 9:1 dichloromethane/isopropanol), (b) Grade 4 chromatography paper (0.21 mm thick; 9:1 methanol/water), and (c) Grade ET31 chromatography paper (0.50 mm thick; 9:1 methanol/water) . Note: 5 μl of blood sample was used, product ion m/z 303 of verapamil was monitored.
