14. Calculations
14.1 Weight of insoluble material, in milligrams:
I = (A2 - A1) + (B2 - B1) mg
where:
I = insoluble material, mg,
A1, B1 = initial weight of filter membrane plus weighing bottle or watch glass, mg, and
A2, B2 = final weight of filter membrane plus weighing bottle or watch glass, mg.
14.2 For Procedure A - Weight of copper in oil, water, and insoluble material in milligrams.
14.2.1 Direct Method:
14.2.2 Ash Method:
14.2.2.1 P is the copper content of water in the 50-mL flask
14.2.3 Total Copper:
