Hobbyists & Industry luminaries alike learn on every visit
(we earn from 'affiliate link' purchases)

Curated with aloha by
Ted Mooney, P.E. RET

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing 1989-2025

-----

ANALYSIS FOR SODIUM THIOCYANATE NEEDED

IS THERE AN EASIER WAY TO DO ANALYSIS FOR sodium thiocyanate [affil links] 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

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: