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ANALYSIS FOR SODIUM THIOCYANATE NEEDED

IS THERE AN EASIER WAY TO DO ANALYSIS FOR sodium thiocyanate [affil link] THAN WHAT OUR LAB DOES. OUR ANALYSIS: 10ML SAMPLE OF BATH; 100ML DI WATER; 15ML 20% H2SO4; 1-2ML SATURATED FERROUS AMMONIUM sulphate; TITRATE WITH 0.1N AGNO3 UNTIL RED COLOR HAS TURNED TO A WHITE ENDPOINT. THE PROBLEM I AM HAVING IS THERE IS NO VISIBLE ENDPOINT?

MIKE CAPPS
ELECTROPLATING/WWT - TENNESSEE
2005

The first guess is inadequate agitation. Are you using a spin bar?

James Watts
- Navarre, Florida
2005

I believe what you need as indicator is ferric ammonium sulphate, not ferrous ammonium sulphate. Double check your procedure.

Dave Wichern
Consultant - The Bronx, New York
2005

I don't know of another method, but we use the absence of red as the endpoint.

Trent Kaufman
electroplater - Galva, Illinois
2005

I NEED AN ANALYSIS METHOD WITH TITRATION FOR SODIUM THIOCYANATE CONTENT %

Bora Akturan
cement additives - Istanbul TURKEY
April 13, 2009

April 13, 2009

Hi, Bora. That was asked & answered. If you don't understand or agree with what has been offered please try to cast your question in those terms rather than re-asking an answered question. Thanks! :-)

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.

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