3.4. Comparison of the proposed technique with other methods
This method was compared with other extraction methods that were previously used for the determination of PAHs in coffee or tea samples, with the results summarized in Table 2. As can be seen, the proposed method demonstrated satisfactory linearity, lower RSDs and relative recoveries compared with the reported methods. The LODs of this work were lower than those achieved by SPE, HS-SPME and comparable with those of SBME and SPME. SBSE offered the lowest LIDs as compared to others but required two hours of extraction time. SPME offered slightly shorter extraction time but required expensive SPME fibres which might not be available in most laboratories.