metric flask with DI water.
NAS Indicator - Dissolve 0.5 g of napthyl azoxine S in 100 mL DI water.
pH 5 Buffer - To 245 grams of sodium acetate trihydrate, add 58 mL of Glacial Acetic Acid. Dilute to 1 liter with DI water.
PROCEDURE:
Pipette 2 mL of bath sample into a 250 mL flask.
Add 50 mL of DI water.
Add 10 mL of pH 5 buffer.
Add 10 drops of NAS indicator.
Titrate with 0.05 M EDTA to a red endpoint.
Record the volume used.
CALCULATIONS:
g/L Copper metal = mL EDTA x M EDTA x 31.8