No passwords, no registration, no paywalls, no popups, no AI

As an Amazon Associate & eBay Partner we earn from affil links

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

Search our quarter-million Q&As

Home of the finishing HOTLINE since 1989

-----

Determination of Al

2003

Hello,

I have been trying to determine Al concentration in a ICP Standard and I use zinc sulphate ⇦ on eBay or Amazon [affil link] to titrate the excess of EDTA I add into my sample. The problem is that I cannot really see the end point.The colour is supposed to change from greenish-blue to reddish-violet and as these colours seem to be "two-tone" it makes it quite difficult to observe the change. I use dithizone R as the indicator. Would there be any other way to perform my titration? I just follow the Eur.Ph. I appreciate your help.

Thank you,

Kay Stack
a laboratory - Carlow, Co. Carlow, Ireland

Try methyl orange ⇦ on eBay or Amazon [affil link] indicator, or screened methyl orange indicator. I am not sure which pH range you would be using for your titration, but those are good for pH 4

Evans
- Nairobi, Kenya
2003

Sorry! Finishing.com is temporarily Read-Only.
Ted Mooney is retiring but I have several offers to take it over.
We're working hard to make sure we find it the best new home.

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: