Table 4 Results of recoveries of FG and CG in foods using simultaneous LC–MS/MS method
Lab 1 | Lab 2 | RSD (%) | |||
|---|---|---|---|---|---|
Measured concentration (μg/mL) | Recoveries (%) | Measured concentration (μg/mL) | Recoveries (%) | ||
Ferrous gluconate | |||||
Concentration (μg/mL) | |||||
50 | 54.9 ± 1.3 | 109.7 | 48.3 ± 3.5 | 96.6 | 9.0 |
200 | 205.3 ± 5.7 | 102.6 | 202.1 ± 5.9 | 101.0 | 1.1 |
300 | 296.0 ± 2.1 | 98.7 | 302.7 ± 5.2 | 100.9 | 1.6 |
400 | 405.4 ± 2.3 | 101.4 | 380.8 ± 9.8 | 95.2 | 4.4 |
500 | 501.9 ± 4.1 | 100.4 | 506.6 ± 3.8 | 101.3 | 0.7 |
R2 (correlation coefficient) | 0.997 | 0.997 | |||
Calcium gluconate | |||||
Concentration (μg/mL) | |||||
50 | 51.1 ± 3.9 | 102.2 | 51.8 ± 2.9 | 103.7 | 1.0 |
200 | 202.9 ± 1.8 | 101.5 | 198.0 ± 0.9 | 99.0 | 1.7 |
300 | 301.3 ± 1.9 | 100.4 | 305.2 ± 0.5 | 101.7 | 0.9 |
400 | 395.0 ± 6.9 | 98.8 | 389.7 ± 8.1 | 97.4 | 1.0 |
500 | 498.8 ± 5.5 | 99.8 | 505.7 ± 2.4 | 101.1 | 1.0 |
R2 (correlation coefficient) | 0.998 | 0.997 | |||