Cleaning for new teflon ( PFA / FEP / PTFE )
Soak in citrad ( ~ couple of hours ) .
Rinse thoroughly UPW .
Immerse completely ( in 1 L jars or bottles ) in 50 % v / v distilled HNO3 for > = 48hrs .
Rinse thoroughly UPW .
Immerse completely ( in 1 L jars or bottles ) in 50 % v / v distilled HCl for > = 48hrs .
Rinse thoroughly UPW .
Immerse completely ( in 1 L jars or bottles ) in 0.1 % v / v distilled HNO3 for > = 48hrs .
Rinse thoroughly UPW .
Immerse completely ( in 1 L jars or bottles ) in 1 - 3M v / v distilled HNO3 for > = 48hrs .
Rinse thoroughly UPW .
Fill and store with ~ 0.1 % v / v distilled HNO3 For already - cleaned teflon for Geotraces .
Rinse with UPW .
Fill with 1 - 3M v / v distilled HNO3 for 24 - 48hrs .
Rinse thoroughly with UPW .
Fill with ~ 0.1 % v / v seastar Nitric / distilled acid for as long as possible before use ( minimum recommended a few hours ) .
