Cobalt standard reagent for dissolved cobalt analyses
Rinse a 100 mL volumetric flask ( that has been cleaned with 10 % hydrocholoric acid cabinet ) with pH 2 Milli - Q 3 times and Milli - Q 3 times .
Fill the flask part way with Milli - Q and add 29.5 μl of the cobalt AA standard ( 1 mg L - 1 ) to the Milli - Q .
The final concentration will be 5 nmol L - 1 .
Carefully fill up to 100 mL Milli - Q using a squirt bottle and invert to mix .
Save a small aliquot in a 5 mL clean bottle for a potential run later on the ICP - MS .
