Issue 22, 2013

Determination of inorganic arsenic in water by a quartz crystal microbalance

Abstract

A quartz crystal microbalance sensor has been developed for the determination of inorganic arsenic species in water. The gold electrode surface was modified by a self-assembled layer of dithiothreitol, and the frequency change of the modified crystal was proportional to the arsenic concentration from 0 to around 50 μg L−1, a range which spans the current US EPA maximum contaminent level of 10 μg L−1 in drinking water. As dithiothreitol is capable of reducing arsenate to arsenite, the sensor detects both species. The method was applied to the determination of arsenic in spiked rain, tap, pond and bottled water; recoveries not significantly different from 100% were obtained for a number of spike additions of less than 10 μg L−1. Arsenic was only detected in the bottled water sample, at a concentration of 8 μg L−1. This method is simple, fast, and inexpensive compared with other conventional arsenic detection methods, and has the potential to be used in the field.

Graphical abstract: Determination of inorganic arsenic in water by a quartz crystal microbalance

Article information

Article type
Communication
Submitted
24 May 2013
Accepted
03 Oct 2013
First published
04 Oct 2013

Anal. Methods, 2013,5, 6286-6291

Determination of inorganic arsenic in water by a quartz crystal microbalance

C. Li, A. E. Başaran and J. F. Tyson, Anal. Methods, 2013, 5, 6286 DOI: 10.1039/C3AY40876K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements