Bottle cleaning procedure for dissolved cobalt analyses
Obtain 60 mL narrow - mouth low density polyethylene bottles ( LDPE ) for this procedure .
Bottles are soaked for 10 days in the acidic detergent , Citranox , and rotated after approximately 5 days to make sure all sides of the bottles have been coated with soap .
The bottles are then rinsed thoroughly with Milli - Q water ( usually 5 times , or until all soap is gone ) , and then filled with 10 % HCl ( new HCl ) to soak for 10 days ( also being rotated after 5 days ) .
Each bottle is then rinsed thoroughly with pH 2 Milli - Q , and double - bagged and stored empty .
