Table 3.

Number (%) of failed samples listed by the active ingredient and test

	Visual inspection	Disintegration test	Colour reaction	Thin-layer chromatography and ultraviolet-visible spectroscopy	Total
Chloroquine	23/39 (59.0%)	3/39 (7.7%)	0/39	5/39 (12.8%)	24/39* (61.5%)
Artesunate	1/9 (11.1%)	0/9	0/9	0/9	1/9 (11.1%)
Lumefantrine/Artemether	0/4	0/4	0/4	0/4	0/4
Sulphadoxine/Pyrimethamine	4/10 (40.0%)	1/10 (10.0%)	1/10 (10.0%)	1/10 (10.0%)	4/10* (40%)
Quinine	0/9	0/9	0/9	3/9 (33.3%)	3/9 (33.3%)
Amodiaquine	0/6	0/6	0/6	0/6	0/6
Total	28/77 (36.4%)	4/77 (5.2%)	1/77 (1.3%)	9/76 (11.8%)	32/77 (41.6%)

* Some samples failed more than one test