Results
Title

Sensitive electrochemical detection of sodium azide based on the electrocatalytic activity of the pasting liquid of a carbon paste electrode.

Authors

Li, Kaixuan; Han, Moyan; Wu, Fengxia; Nsabimana, Anaclet; Zhang, Wei; Li, Jianping; Xu, Guobao

Abstract

Sodium azide (NaN3) is highly toxic and widely used in, for example, automobile airbags and biochemical laboratories. The electrochemical detection of sodium azide on commonly used electrodes is challenging due to sluggish electron transfer, but it has been achieved using a boron-doped diamond thin-film electrode and a highly oriented pyrolytic graphite electrode. Utilizing the electrocatalytic activity of the pasting liquid of a carbon paste electrode, we developed an effective method for the electrochemical detection of sodium azide in which silicone oil was employed as the pasting liquid of the carbon paste electrode. This simple and cheap silicone-oil-based carbon paste electrode exhibited comparable sensitivity to the boron-doped diamond thin-film electrode and highly oriented pyrolytic graphite electrode. The limit of detection for sodium azide at the silicone-oil-based carbon paste electrode was found to be 0.1 μM. Recoveries from diluted human serum samples were between 97.2 and 101.3%.ᅟ<graphic></graphic>

Subjects

ELECTROCHEMICAL sensors; SODIUM azide; ELECTROCATALYSIS; CARBON electrodes; THIN films

Publication

Analytical & Bioanalytical Chemistry, 2018, Vol 410, Issue 20, p4953

ISSN

1618-2642

Publication type

Academic Journal

DOI

10.1007/s00216-018-1144-1