Determination of sulfuric acid content in acid sulfate copper plating bath

Determination of sulfuric acid content:

1 reagent;

1) 0.1% methyl orange. Dissolve 0.1 g of this salt in 100 ml of water.

2) 1 equivalent of sodium hydroxide (40 g/L)

2.2 Analysis;

1) Use a pipette to draw 5 ml of the solution into a 250 ml Erlenmeyer flask.

2) Add 250 ml of distilled water, and add 10 drops of methyl orange indicator.

3) Titrate with 1 equivalent of sodium hydroxide solution to the pale green end point.

2.3 Calculation:

1ml equivalent sodium hydroxide=0.049g/sulfuric acid

1ml equivalent sodium hydroxide*9.8=g/L sulfuric acid

1ml equivalent sodium hydroxide*1.31=oz/gallon sulfuric acid

D. Acid fluoroborateAnalysis of copper plating

1.0 Determination of copper content-see the analysis section of acid sulfate copper plating solution.