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| Spiked clenbuterolcon-centration (ng·mL−1) | Average SERS peak intensityI1474(counts) | Amount detecteda (ng·mL−1) | Recovery (%) (n = 6) | RSDb (%) |
|---|---|---|---|---|
| 1 | 54.31 | 0.92 ± 0.04 | 92.4 | 4.32 |
| 2 | 88.39 | 1.66 ± 0.02 | 83.4 | 1.28 |
| 5 | 279.01 | 4.58 ± 0.08 | 91.5 | 1.82 |
| 10 | 563.48 | 8.84 ± 0.07 | 88.4 | 0.81 |
| 20 | 904.22 | 16.56 ± 0.23 | 82.8 | 1.39 |
aAverage values from six determinations for each concentration.
bRelative standard deviation of peak intensity (RSD (%) = (SD/mean) × 100).
