Feb 17, 2015 · Muscle tissue dry weight was determined in samples which were collected, dried, and placed in 40 mL certified; pre-cleaned quartz glass sample vials. These were stored a −20°C until analysis. Samples were digested with 70% HNO 3 /30% H 2 SO 4 in the vial and heated until all soft tissue was dissolved. After cooling, the digests were diluted