Direct electrochemical detection of sodium azide in physiological saline buffers using highly boron-doped diamond electrodes

Akane Suzuki, Tribidasari A. Ivandini, Akihide Kamiya, Satoshi Nomura, Mikito Yamanuki, Koichi Matsumoto, Akira Fujishima, Yasuaki Einaga

研究成果: Article査読

22 被引用数 (Scopus)

抄録

Direct detection of sodium azide was examined by using highly boron-doped diamond (BDD) electrodes in some physiological saline buffer solutions. Three important saline buffers, ADA buffer (N-(2-acetamido) iminodiacetic acid), sodium EDTA and imidazole, were investigated. Hydrogen-terminated BDD was fixed for the investigation since it showed much better sensitivity for azide oxidation in comparison with the oxygen-terminated one. Wide range of buffer concentration was examined. A well-separated peak of sodium azide was observed in its mixture with the buffers, resulting in selective sodium azide detection. The current responses were exactly total addition of sodium azide and buffer current responses. The present method was evidenced to be available for direct detection of sodium azide in two samples of commercial diluents for cell counting. A standard addition method was applied. Sodium azide concentrations of 502 and 1355 μg mL-1 were detected in both samples with the R.S.D.s of 0.07 and 2.37%, respectively. Validation was achieved by the comparison with the sample concentrations given by the manufacturer. Simple, selective, good sensitivity and excellent reproducible detection make the diamond electrodes very attractive for numerous electroanalytical applications.

本文言語English
ページ(範囲)500-507
ページ数8
ジャーナルSensors and Actuators, B: Chemical
120
2
DOI
出版ステータスPublished - 2007 1 10

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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