After a screening test has been used to determine the identity of an abused drug, the confirmation test of choice is the thin-layer chromatography.

If this question is a true or false question then the answer in this question is false. It is not a thin-layer chromatography that include in the confirmation test of choice after a scrrening test has been used to determine the identity of an abused drug. So the answer is False.

The answer is False, The technique mostly use widely by forensic toxicologists for detecting alcohol in blood is the gas chromatograph. Always use of a drug, a person may become less responsive to a drug’s effects and may be able to tolerate blood drug concentrations that would normally be fatal to the casual drug user.