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

Tsunoda, Kin-ichi; Itabashi, Hiromitsu; Akaiwa, Hideo

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

Cited by 21 publications

(10 citation statements)

References 14 publications

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“…The spectrophotometry has been employed to evaluate new concepts of analysis. For example, Tsunoda et al 12 showed the applicability of their glass optical waveguide to spectro photometry by using o-Phen spectrophotometry. Olivera et al 13 proposed an asynchronous merging zone method † To whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Internal Standard-Amplitude Modulated Multiplexed Flow Analysis

et al. 2017

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A new concept of flow analysis, internal standard-amplitude modulated multiplexed flow analysis, is proposed. A proof of concept was verified by applying it to the determination of ferrous ion (Fe 2+ ) by 1,10-phenanthroline (o-Phen) spectrophotometry. The flow rates of sample solutions containing Methylene Blue (MB) as an internal standard substance were sinusoidally varied at different frequencies. The solutions were merged with a color reagent (o-Phen) solution, while the total flow rate was held constant. Downstream, analytical signals were monitored at the maximum absorption wavelengths of Fe 2+ -o-Phen complex and of MB (510 and 644 nm, respectively). The signals were respectively analyzed by fast Fourier transform. The concentrations of the analytes in respective samples were simultaneously determined from the amplitudes of the corresponding wave components. The precision, linearity of the calibration curve, limit of detection and robustness against deliberate fluctuation in flow rate were greatly improved by introducing the internal standard method. Good recoveries of around 100% were obtained for Fe 2+ spiked into real water samples.

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Section: Introductionmentioning

confidence: 99%

Internal Standard-Amplitude Modulated Multiplexed Flow Analysis

et al. 2017

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“…Sputtering conditions were the same as those of the previous paper. 10 These two SOWGs supported only n=0 mode of guided light, that is, TE 0 and TM 0 modes. On the other hand, the third one was a multimode sheet glass SOWG (SG-SOWG, Fig.…”

Section: Methodsmentioning

confidence: 99%

Characteristics of Sensor Response of a Difference Interferometric Slab Optical Waveguide Refractive Index Sensor with a Prism Coupling Method

et al. 1999

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“…It has been intensively applied to optical sensing of surface chemical species and chemical reactions [ [8][9][10]. The application of the SOWG for analysis of chemical systems was first proposed by Midwinter [11].…”

Section: Introductionmentioning

confidence: 99%