Table 1.

Comparison between colorimetric test results and client expectations about the substance bought and submitted for testing.

Client expectation (No. of samples)	Colorimetric test results (No. of samples)
	Ketamine (n = 25)	MDMA (n = 33)	Amphetamine (n = 10)	Cocaine (n = 11)	Heroin (n = 8)	LSD (n = 4)	Mescaline (n = 0)	Unknown (n = 29)
Ketamine (n = 34)	25	0	0	0	0	0	0	9
MDMA (n = 40)	0	32	0	0	0	0	0	8
Amphetamine (n = 17)	0	0	10	0	0	0	0	7
Cocaine (n = 14)	0	0	0	11	0	0	0	3
Heroin (n = 10)	0	0	0	0	8	0	0	2
LSD (n = 4)	0	0	0	0	0	4	0	0
Mescaline (n = 1)	0	1	0	0	0	0	0	0