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.
The saliva collector (Fig. 2a) is placed under the tongue, allowed to saturate with saliva (≈10 seconds) and inserted into the reader (Fig 2b). Raising the lever transfers the saliva sample onto the reagent paper containing the chromogenic substrate (Fig 2b). After 10 seconds, reflectance of the product is measured photometrically at 430 nm (Fig 2c) and provided as an optical readout.
