No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Cyanide spot-test reagents




are there any solutions/reagents that can be applied to a silver plated component to spot-check for cyanide residues on the surface of the metal after plating?

Nigel Gill
Advanced Technologist - Chemistry & Materilas - Glasgow, Scotland
March 7, 2008



March 29, 2008

Sure. Wash whatever it is with a small volume of 0.1 N NaOH solution, then spot test the liquid with a Hach "Cyaniver" chemistry kit, or pyridine/barbituric acid reagent.

If you are having a problem with cyanide in your wastewater and you're not using any cyanide, and are thinking that it is coming in on parts from your supplier, good luck; but every time, without exception, that I have conducted such a test I have gotten a dead negative result.

dave wichern
Dave Wichern
Consultant - The Bronx, New York




(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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"