About: http://webisa.webdatacommons.org/345721165

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	By treating the shrapnel fragment with an extracting agent, such as nitric acid, for 5 minutes in an ultrasonic cleaner, sufficient metal is solubilized to allow for colorimetric detection using a pyridylazo dye.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov