All-Solid-State Polyvinyl Chloride Membrane Lithium-Selective Electrode with Improved Selectivity and Its Application in Serum Lithium Assay

$113.00 plus tax (Refund Policy)

Buy Article:

Abstract:

A new miniaturized all-solid-state polyvinyl chloride (PVC) membrane Li+-selective electrode with extra ten-fold improved Li-selectivity towards Na + has been described. The selectivity of the membrane contained 6,6-dibenzyl-1,4,8-11-tetraoxosiclotetradecane was improved with the addition of Trioctylphosphine oxide (TOPO). The effect of TOPO ratio in the electrode membrane was examined under steady-state conditions. The electrode containing TOPO at the ratio of 1.0% performed best potentiometric properties for the serum Li+ assays. The proposed TOPO-embedded Li+-selective electrodes with improved selectivity (lithium to sodium; 1:1000) had a wide concentration range of 2.7 × 10–6 –1.0 × 10–1 M and a slope of 47.6 mV/decade (R 2 = 0.9981). The developed electrode was analytically applied for the determination of lithium contents of diluted human serum samples by using direct and standard addition measurement methods. The obtained potentiometric results for the serum samples with the proposed electrode were confirmed by atomic absorption spectrophotometry (AAS) results at 95% confidence level.

Keywords: LITHIUM SELECTIVE ELECTRODE; POTENTIOMETRY; PVC MEMBRANE ELECTRODE; SERUM ANALYSIS; TRIOCTYLPHOSPHINE OXIDE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/sl.2011.1717

Publication date: October 1, 2011

More about this publication?
  • The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • ingentaconnect is not responsible for the content or availability of external websites
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