A method suitable for quality evaluation of soft-shell crabs, mud crabs
A technique for evaluating the quality of mud crabs, which can be used in climate change adaptation, chemical analysis by combustion, and weighing by removing certain components. It can solve the problem of unclear sources, uneven quality, and soft shell crab market good and bad issues
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Embodiment 1
[0018] Example 1: Establishment of detection standards for the quality of soft-shell crabs of pseudo-cave blue crabs
[0019] In the research, the applicant found that the hepatopancreas is an important part that determines the taste of soft-shell crabs, and then determined the taste of soft-shell crabs by using headspace solid-phase microextraction (SPME) and gas chromatography-mass spectrometry (GS-MS). Muscle and hepatopancreas moisture of hard shell crab and soft shell crab 0-48h after molting ( figure 1 ), ash ( figure 2 ), amino acids (Table 1), mineral elements (Table 2), flavor substances (Table 3) and fatty acid content (Table 4).
[0020] By comparing the difference in nutritional quality and flavor at different time points before and after molting, the water content in edible tissues, alanine in amino acids, calcium and iron in mineral elements, and monounsaturated fatty acids were determined. Fatty acid content; the content of 3-n-decyl alcohol in volatile aroma...
Embodiment 2
[0034] Embodiment 2, the quality detection of the soft-shell crab of different shelling periods
[0035] The soft-shell crabs to be evaluated are selected from the soft-shell crabs of the same quality prepared by indoor crab apartment breeding in the same period (the hard-shell crabs have a quality of 160.00 ± 31g), and the 0h after molting The soft-shell crabs are marked as S1, and the soft-shell crabs 6h after molting are marked as S2. The quality identification method of the soft-shell crab established in Example 1 is adopted, wherein the measurement units of water and ash are all g / 100g; the measurement units of Ala are mg g-1; the measurement units of Ca, Fe and Monounsaturated fattyacids are mg kg -1; 3-decanol is expressed as a percentage value.
[0036] The specific process is as follows:
[0037] 1) Observe the molt and start timing, and take samples according to the time points of 0h and 6h after moulting, take hepatopancreas from each individual, and randomly samp...
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