No abstract

Levels of mercury in bottom feeding freshwater fish and their corresponding fish protein concentrates have been determined and found to correlate with a fish:fish protein concentrate enrichment factor of approximately 5. This finding indicates that no mercury is extracted from the fish used in this study during the concentrate manufacture via isopropyl alcohol extraction, and further suggests that only fish of low initial mercury concentration may be used as starting material in this process if the resultant fish protein concentrate (fpc) is not to exceed the maximum allowable mercury concentration level.