Dried, unprocessed fin samples (0.05–0.3 g drywt.)were freeze dried and broken into pieces by hand while inside zip-type plastic bags and weighed into 15-mL centrifuge tubes containing 7 mL of 4.57 M HNO3.
Dried, unprocessed fin samples (0.05–0.3 g drywt.)were freeze driedand broken into pieces by hand while inside zip-type plastic bags andweighed into 15-mL centrifuge tubes containing 7 mL of 4.57 M HNO3.