Research Article
Analysis of Leafy Vegetable Nitrate Using a Modified Spectrometric Method
Table 3
Results from stability tests and spike analyses.
| | Vegetable | Stability test | Spike analysis | | N | CV (%) | Concentration without spiking (μg/g) | Recovery rate (%) |
| | Bok coy | 5 | 5.55 | 1490 | 74.8 | | Cabbage | 5 | 5.33 | 821 | 75.0 | | Celery | 5 | 2.40 | 2287 | 86.0 | | Chinese cabbage | 5 | 1.39 | 1287 | 84.1 | | Chinese kale | 5 | 3.26 | 607 | 78.0 | | Lettuce | 5 | 5.49 | 298 | 89.0 | | Mustard green | 5 | 2.40 | 2469 | 83.3 | | Pak choi | 5 | 2.04 | 3057 | 91.4 | | Water spinach | 5 | 4.42 | 2087 | 91.4 |
| | Mean±SD | | 3.59±1.63 | 1600±934 | 83.7±6.52 |
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CV = coefficient of variation; SD = standard deviation.
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