Table 3.

Comparison between colorimetric test and GC/MS results.

Colorimetric results (No. of samples)	GC/MS results (No. of samples)
	Ketamine (n = 25)	MDMA (n = 28)	Amphetamine (n = 11)	Cocaine (n = 12)	Heroin (n = 7)	LSD (n = 4)	Mephedrone (n = 2)	MIX (n = 9)	Debris (n = 9)	Methamphetamine (n = 1)	Adulterant as main component (n = 13)
Ketamine (n = 25)	25	0	0	0	0	0	0	0	0	0	0
MDMA (n = 33)	0	26	0	0	0	0	0	2	0	1	4
Amphetamine (n = 10)	0	0	9	0	0	0	0	1	0	0	0
Cocaine (n = 11)	0	0	0	10	0	0	0	0	0	0	1
Heroin (n = 8)	0	0	0	0	5	0	0	0	0	0	3
LSD (n = 4)	0	0	0	0	0	4	0	0	0	0	0
Unknown (n = 29)	7	2	2	2	2	0	2	6	1	0	5