Table 1.

Comparison of the RR% for different concentrations of 1% 2HP-β-CD, 1% βCD and 1% γ-CD as affinity agents for the RR of 25 μM of ME and LE using a 20 kDa (PC) probe at 0.5 μL min⁻¹ at room temperature (n = 3). *Indicates there is no significant difference in CD recoveries compared to the control (p = 0.05).

[Cyclodextrin]	Met-Enkephalin	Leu-Enkephalin
aCSF (control)	17.6 ± 1.1	16.2 ± 1.2
0.1% 2HP-β-CD	20.7 ± 2.1 *	19.2 ± 2.3*
0.5% 2HP-β-CD	24.7 ± 1.2	23.1 ± 0.9
1% 2HP-β-CD	31.2 ± 3.5	31.6 ± 3.5
1% β-CD	25.5 ± 1.2	27.1 ± 2.5
1% γ-CD	24.4 ± 1.6	23.7 ± 1.8