Table 2. Mass spectrometry data for diazepam, flunitrazepam and silylated temazepam as pure compounds and after extraction from beer as exemplar data.

Drug	Ion (m/z)	% intensity of pure compounds	% intensity after extraction from spiked beer
Diazepam	285	42	42
	284	74	71
	283	97	94
	257	46	43
	256	100	100
	221	33	36
Flunitrazepam	313	67	69
	312	100	100
	286	97	90
	266	61	59
	238	43	40
	183	20	20
Silylated temazepam	372	19	21
	345	36	39
	344	25	26
	343	100	100
	283	31	37
	257	36	44
	221	6	7