Application of the glass slab optical waveguide to the spectrophotometric determination of the iron (II)—1, 10-phenanthroline complex by flow analysis

doi:10.1016/0003-2670(94)00323-E

Analytica Chimica Acta

Volume 299, Issue 3, 10 January 1995, Pages 327-332

https://doi.org/10.1016/0003-2670(94)00323-E Get rights and content

Abstract

A slab optical waveguide (SOWG) absorption detector was applied to the determination of the orange-red Fe(II)—1,10-pheranthroline complex [Fe(phen)₃]²⁺ by flow analysis. When a sample solution containing [Fe(phen)₃]²⁺ was introduced into a flow of sodium dodecylbenzene sulphate (DBS⁻) solution, an ion pair of [Fe(phen)₃]²⁺ and DBS⁻ was formed in a mixing coil, and was then adsorbed on the glass SOWG. The adsorbed ion pair caused the attenuation of light of a green He-Ne laser(543.5 nm) or of an Ar ion laser (multi-line, mainly 488 nm and 515 nm). The best sensitivity was obtained with a glass SOWG fabricated by a radio frequency sputtering method, which was 9.5 times higher than that with a conventional spectrophotometer (1-cm cell) for a 0.5-ml sample solution.

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Application of the glass slab optical waveguide to the spectrophotometric determination of the iron (II)—1, 10-phenanthroline complex by flow analysis

Abstract

Sensors Actuators

Anal. Chim. Acta

Helv. Chim. Acta

J. Phys. Chem.

Anal. Chem.

Anal. Chem.

Anal. Chem.

Anal. Chem.