A Study of the Effect of pH on the Determination of Zinc by Atomic Absorption Spectrophotometry

$29.00 plus tax (Refund Policy)

Buy Article:

Abstract:

Substantial errors in the determination of zinc by atomic absorption spectrophotometry can be caused by differences in pH among samples and standards. Zinc absorption is constant in the pH range of about 2 to 5. Between pH 5 and 10, a sharp decrease in absorption is observed. With an increase above pH 10, zinc absorption levels off to a constant value. Experimental data suggested that pH variation rather than chemical interferences is primarily responsible for the variation of absorption in zinc analysis. Several possibilities, such as sorption of zinc to container walls, zinc hydroxide formation, zinc complex formation, and zinc oxide formation in flame subsequently attacked by hydrogen atoms, have been considered in an attempt to understand the cause of pH-dependent zinc absorption.

Keywords: Spectrophotometry; Zn analysis; pH effect

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370273774333786

Affiliations: Geological Survey, United States Department of the Interior, Sacramento, California 98514

Publication date: March 1, 1973

More about this publication?
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more