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Separation and online preconcentration by multistep stacking with large volume injection of anabolic steroids by capillary electrokinetic chromatography using charged cyclodextrins and UV absorption detection

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Figure

Figure 1. Structures and names of the three anabolic ster- ster-oids studied in this work.
Table 1. Analysis steps in the online multistep stacking and separation of MTS, MTD and TST
Figure 2. Separation of a mixture of MTS, MTD and TST (~3610 –4 mol/L in each component in 5% v/v methanol/water) with a 50 mmol/L borate buffer at pH 9 containing an anionic substituted b-CD or the bile salt taurodeoxycholic acid
Figure 3. Separation of a mix- mix-ture of MTS, MTD and TST (~3610 –4 mol/L in each  com-ponent in 5% v/v methanol/ water) with a 50 mmol/L borate buffer at pH 9 adding the native b-CD to the anionic CDs or the sodium taurodeoxycholate
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