The quality of artemia cysts is mainly evaluated through indicators such as hatching rate, moisture content, and impurity content. The specific methods are as follows:
Hatching rate
A-level eggs: hatching rate ≥ 90%
B-grade eggs: 85% -90%
C-grade eggs: ≥ 70%
Cysts count and moisture content
Grade A cystes: 220000-290000 per gram, with a moisture content of 10%
Grade B: 170000 to 220000 per gram, with a moisture content of 13%
Grade C: 80000 to 170000 per gram, with a moisture content of 15%
Impurities and odors
High quality cysts have low impurity content (imported ≤ 0.3 ‰), and domestic cysts fluctuate greatly
Normal fishy smell is similar to that of seafood, with a light fishy smell and no pungent chemical odor
Hatching time and morphology
High quality cytes: Hatching time within 24 hours, strong vitality of the insect body, small size, and not easy to sink to the bottom
Poor quality cysts: hatched for more than 24 hours, the cysts body is prone to sinking to the bottom or has poor vitality
Appearance and treatment
High quality cytes are brown in color, with full and impurity free particles, and high dryness
Avoid choosing products with colors that are too dark or too light, and be wary of staining or aging cysts.
It is recommended to make a comprehensive judgment based on hatching rate, moisture content, impurity content, and hatching time, and prioritize selecting legitimate brands and checking packaging information.