Detection of Alternative Drugs for Illegal Injection Based on Surface-Enhanced Raman Spectroscopy

Table 1

Assignment of the Raman characteristic peaks of promethazine.

Solid Raman wave number (cm^−1)	SERS wave number (cm^−1)	Calculated wave number (cm^−1)	Assignment
1034	1034	1030	Double benzene ring internal symmetric bending
1107	1112	1085	C-S-C stretching + benzene ring bending
	1254	1236	C-N-C stretching
1292		1306	Benzene ring internal symmetric stretching + nitrogen heterocyclic ring symmetric stretching
1571	1571	1572	Benzene ring internal symmetric stretching