Think & Tinker, Ltd.
P.O. Box 1606, Palmer Lake, CO 80133
Tel: (719) 488-9640, Fax: (866) 453-8473
Sales: Sales@ThinkTink.com, Support: Support@ThinkTink.com
Think
&
Tinker
Ltd.





SkypeMe at
"thinkntink"
PREVIOUS navbutn.gif (1645 bytes) NEXT
Acid-Copper Electroplating Module Model 1000 Manual
Chemical Analysis - Copper Concentration Analysis I

Copper Concentration Analysis
If you have not done so, please read the "DOs and DON´Ts" section now.

Equipment Required:
  • Titration flask (125 ml)
  • 10 ml Automatic pipette
  • Digital titrator
Reagents Required:
  • Deionized water
  • pH 9.5 Buffer
  • PAN indicator
  • .800M EDTA tetrasodium salt (titrant)
Procedure:
  1. Measure 50 ml of heated deionized water into the titration flask. (about 40°C, 104°F will yield optimum results)
  2. Using a pipette, add .50 ml of sample etchant (5 charges from automatic pipettor).
  3. Add the pH 9.5 buffer one drop at a time until the solution turns a light blue or violet color (two or three drops max.). This point is rather subtle so watch for it closely.
  4. Add 2 drops of PAN indicator to yield a bright violet solution. Swirl flask to mix thoroughly.
  5. Using the digital titrator, titrate with the .800M EDTA tetrasodium salt to a green (or yellow-green) end point. Record the number of drops of titrant from the digital indicator.
  6. The concentration of dissolved copper present (as cupric ion in grams per liter (g/L)) can be directly calculated using (digital titrator reading for copper analysis is denoted NumCop):
    Copper concentration (g/L) = 0.127 x NumCop
The acceptable range of NumCop is:
Cu Optimum Range : 17 to 23 (grams/Liter)
(or 8 to 12 oz./gal. [60 to 90 g/L] of copper sulfate)
NumCop: 136 to 181

In normal operation (after the bath stabilizes through regular use), the copper concentration will never be outside the acceptable range.

PREVIOUS navbutn.gif (1645 bytes) NEXT


Established 1990

On the web since 1994

Payment Processing
Sales: 1-(719) 488-9640    Tech Support: 1-(719) 488-9640    Fax: 1-(866) 453-8473
Copyright © 1994 - 2014 Think & Tinker, Ltd. Updated 2/13/2014 7:36:56 AM