Table 1.
LOD, LOQ, RSD and urine FA concentrations detected by using FA probe and Fluo-HPLC methods within a day at different time points, respectively.
| Test items | 0 min | 30 min | 1 h | 2 h | Mean ± S.D. | Recovery (%) | RSD (%) | LOD (μM) | LQD (μM) |
|---|---|---|---|---|---|---|---|---|---|
| FA probe-urine FA | 94.52 | 96.85 | 92.17 | 91.03 | 93.64 ± 6.26 | 97.3 | 6.68 | 1.27 | 2.48 |
| HPLC-urine FA | 52.49 | 53.33 | 53.58 | 54.06 | 53.36 ± 3.85 | 98.1 | 7.22 | 1.52 | 2.91 |
Note: Data in means (n = 10). No significant difference among the values detected by these two methods within a day (P > 0.05), respectively.
FA: formaldehyde; LOD: limits of detection; LOQ: limits of quantization; RSD: relative standard deviations; HPLC: high-performance liquid chromatography.