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How to identify high-quality dehydrated spinach by color and smell?
High-quality dehydrated spinach can be identified by color and smell. The following is a combination of the characteristics of dehydrated spinach and sensory identification standards:
1. Color identification method
Color characteristics of high-quality dehydrated spinach
Overall color: It should be uniform dark green or bright green, with no obvious color difference between the leaves and petioles. Naturally dried dehydrated spinach may be slightly dark green, but there should be no large-scale yellowing or browning.
Veins and details: The veins are clearly visible, without obvious spots or whitish areas. If yellow spots, brown spots or partial fading occur, it may be due to insufficient blanching or moisture oxidation during storage.
Natural gloss: The surface of high-quality products should have a slight gloss. If the color is gray and dull, it may be due to the decomposition of chlorophyll due to excessive drying temperature or improper storage.
2. Odor identification method
Odor characteristics of high-quality dehydrated spinach
Fresh plant fragrance: It should have a light fragrance similar to hay or fresh spinach, without pungent odor. Artificially dried spinach may have a slightly toasted aroma, but it should not have a burnt smell.
Natural and odorless: Because blanching and high-temperature drying have removed most of the oxalic acid and astringency, high-quality products can still retain a slight sweetness after rehydration.
3. Auxiliary identification skills
Combined with touch and packaging
Dryness: High-quality dehydrated spinach should have a crisp texture, be easy to break and have no toughness when squeezed. If there is adhesion or moisture, it may be damp and moldy.
Packaging integrity: Sealed packaging can avoid oxidation discoloration and odor invasion. If the packaging is damaged or leaking, it is easy to accelerate quality deterioration.
Rehydration verification method
Color after rehydration: After soaking, the leaves of high-quality products will return to emerald green. If they turn yellow or brown, there may be serious nutrient loss.
Rehydration odor: Spinach should have no odor after rehydration. If there is a noticeable sour or corrupt smell, it indicates improper processing or storage.
Through the above methods, the quality of dehydrated spinach can be systematically evaluated to ensure that you buy products that are both nutritious and safe.