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Intra- and inter-day repeatability for quantification of citric acid in tomato.
| Experiment | HPLC | GC-MS | ||||||
|---|---|---|---|---|---|---|---|---|
| Repeats | Average in mg/l | SD in mg/l |
SD in % |
Repeats | Average in mg/l | SD in mg/l |
SD in % |
|
| Day 1 | 4 | 1924 | 40 | 2.1 | 4 | 1978 | 20 | 1.0 |
| Day 2 | 4 | 1974 | 21 | 1.1 | 4 | 2097 | 71 | 3.4 |
| Day 3 | 4 | 1901 | 21 | 1.1 | 4 | 1911 | 59 | 3.1 |
| Day 4 | 4 | 1961 | 42 | 2.1 | 4 | 1998 | 59 | 2.9 |
| Inter-day | 16 | 1940 | 42 | 2.2 | 16 | 1996 | 85 | 4.3 |
