title: Analytical error due to concentration gradients in frozen and thawed samples.
mesh_terms: D002118:Calcium / Q000032:analysis* / Q000097:blood / Q000652:urine; D003300:Copper / Q000032:analysis* / Q000097:blood / Q000652:urine; D005069:Evaluation Studies as Topic; D005615:Freezing; D006801:Humans; D008722:Methods; D012964:Sodium / Q000032:analysis* / Q000097:blood / Q000652:urine; D013054:Spectrophotometry, Atomic; D013542:Sweat / Q000032:analysis; D014732:Vibration
chemical_list: D003300:Copper; D012964:Sodium; D002118:Calcium