Crab detection

The detection methods of crabs involve many aspects, including judging their life and death, quality, harmful substance content, etc. The following are some specific detection methods:

1. Methods for judging the life and death of crabs
Observe the crab's eyes: Gently touch the crab's eyes. If the eyes can move, it means the crab is alive.
Watering test: Drop a few drops of water on the crab's mouth. The living crab will react and even spit out bubbles.
Check the crab mouth: Put the crab in water. If it can spit out bubbles, it means the crab is alive.
Untie the rope and observe: Untie the tied crab rope, put it in a room temperature environment, wait for a while, and observe whether it will move.
Crab claw test: Straighten the crab's claws, then let go. If the crab claws can bend back quickly and naturally, it means the crab is still alive.
2. Quality detection method
Weight and size detection: Use an electronic scale for accurate measurement to ensure that each crab reaches the specified weight, and is classified according to the size of the crab. The price of crabs of different grades is different.
Crab meat texture detection: judge the freshness of crab meat by touching its firmness.
Appearance and odor inspection: consumers can make a preliminary judgment by observing the appearance of crabs, smelling their odors, and other simple methods.
III. Harmful substance detection
Chemical analysis method: determine specific components in samples through chemical reactions, such as heavy metal content, pesticide residues, etc. This method has high accuracy, but the operation is complicated and time-consuming.
Instrumental analysis method: use precision instruments such as high-performance liquid chromatographs and gas chromatographs to quantitatively analyze samples. It also has high accuracy, but the cost is high.
Rapid detection technology: including immunoassay, enzyme inhibition method, biosensor, etc., with the advantages of simple operation, fast detection speed, and low cost. Although its sensitivity and accuracy are slightly inferior to traditional methods, it has wide application value in specific scenarios.
IV. Biochip technology
As an emerging detection method, biochip technology uses microarray technology to fix a large number of biorecognition molecules on the chip surface to achieve simultaneous detection of multiple targets. This technology has the advantages of high throughput, high efficiency, and a high degree of automation, and it is an important development direction in the field of crab detection in the future.

5. Inspection and Sample Collection Process
Inspection: Consumers or manufacturers send samples to designated testing agencies.
Sample Collection: Professionals receive and record relevant information, then prepare and test samples, and finally issue data reports.
In summary, crab detection methods involve many aspects, from judging life and death to quality testing to harmful substance testing, all of which require scientific and accurate methods. At the same time, with the continuous development of technology, new detection methods are constantly emerging, providing a strong guarantee for the healthy development of the crab industry.