Flow-Injection Preconcentration of Chloramphenicol Using Molecularly Imprinted Polymer for HPLC Determination in Environmental Samples

Table 2

The recovery of CAP preconcentration on MIP flow through reactor in FIA system with UV detection for natural water samples spiked with known amounts of CAP. Preconcentration was carried out with flow rate 1.9 mL/min, and elution with 1.0 mL methanol at 0.48 mL/min. Flow-through reactor was used with 100 mg MIP bed.

Sample	Initial sample volume, mL	Added CAP, μg/L	Enrichment factor	Average recovery, %	RSD of recovery, %
Tap water	250	3.60	250	78.2	4.3
Tap water	100	9.00	100	92.9	1.5
Tap water	100	1.00	100	95.7	1.3
River water	250	3.60	250	80.9	1.7
River water	100	1.00	100	94.9	1.3