Table 5.

Equations for Recovery curves of the analytes. Analytes with corresponding slopes (m_r) and y-intercepts (b) characteristic of their recovery curves with y = m_r x + b. The slopes of the recovery curves are directly proportional to the recovery rate.

	Analytea	mr	b	r2
1	13-cis RA	0.8115± 0.0224	−9.78 ± 9.39	0.9977
2	9-cis RA	0.8053± 0.0212	−14.28 ± 8.49	0.9979
3	all-trans RA	0.8849± 0.0270	−10.29 ± 7.77	0.9916
4	all-trans retinol	0.7389± 0.1481	643.70 ± 34.02	0.8924
9	all-trans retinyl palmitate	0.8037± 0.024	20.73 ± 11.73	0.9974
11	δ – tocopherol	0.8562± 0.0191	−118.40 ± 88.45	0.9985
12	γ – tocopherol	0.8741± 0.0238	−151.40 ± 123.5	0.9978
13	α – tocopherol	0.9237± 0.0449	1554.00 ± 306.1	0.9930
15	all-trans lutein	0.9695± 0.1122	59.46 ± 19.72	0.9613
17	all-trans lycopene	0.6834± 0.0529	−10.74 ± 7.22	0.9824
18	all-trans-β-carotene	0.9979± 0.0780	2.62 ± 14.81	0.9820

Recovery was tested in liver samples. It should be noted that recoveries for all-trans retinyl palmitate and β-carotene were assessed in FBS.