Table 4: Recovery rates of four pesticides in the spiked blank carrot samples when molecularly imprinted nanomicrospheres were used for extracting pesticides and results of actual samples (mean ± SD, ).

PesticidesSamples (ng·g−1)Spiked level = 0.5 ng·g−1Spiked level = 2.5 ng·g−1
CarrotDetected content Recovery (%)/RSD (%)Detected contentRecovery (%)/RSD (%)

Phoxim0.830.431 ± 0.02686.2/(6.0)2.29 ± 0.2291.6/(9.6)
Tolclofos-methyl0.690.445 ± 0.02889.0/(6.3)2.64 ± 0.23105.6/(8.7)
ChlorpyrifosN.D0.452 ± 0.02990.4/(6.4)2.25 ± 0.1990.0/(8.4)
Parathion-methylN.D0.464 ± 0.03492.8/(7.3)2.43 ± 0.1897.2/(7.4)

N.D: no detection; RSD: relative standard deviation.