Table 4.

Linearity data

	Day 1		Day 2		Day 3		Day 4
Compound	ra	RSD, %	r	RSD, %	r	RSD, %	r	RSD, %
Octopamine	0.99988	1.6	0.99984	1.9	0.99986	1.7	0.99972	2.7
Synephrine	0.99996	0.95	0.99992	1.3	0.99997	0.83	0.99992	1.4
Phenylephrine	0.99998	0.56	0.99999	0.53	0.99998	0.62	0.99993	1.3
Tyramine	0.99993	1.2	0.99989	1.6	0.99985	1.8	0.99985	2.0
N-methyltyramine	0.99998	0.72	0.99997	0.82	0.99992	1.3	0.99992	1.5
Hordenine	0.99990	1.4	0.99999	0.54	0.99992	1.3	0.99995	1.1

^ar = Correlation coefficient.