Preconcentration of hydrogen peroxide by membrane filtration and its application to the spectrophotometric determination of hydrogen peroxide in rainwater.

Matsubara, Chiyo; Sato, Tadayori; Sato, Yoichi; Takamura, Kiyoko

doi:10.2116/bunsekikagaku.42.11_773

Cited by 5 publications

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“…10 For best sensitivity it is necessary to chromatographically separate the excess reagent from the H2O2 complex. 11 Other complexes of Ti(IV), e.g., those of 2-bromopyridylazo-5-sulfopropylaminophenol, 12 2-(5-bromo)-pyridylazodiethylaminophenol, 13 o-sulfophenylfluorone, 14 5-(bromo)pyridylazo-5-propyl-N-sulfonatopropylaminophenol 15 have also been studied.…”

Section: Introductionmentioning

confidence: 99%

Selective Measurement of Gaseous Hydrogen Peroxide with Light Emitting Diode-Based Liquid-Core Waveguide Absorbance Detector

Dasgupta

2003

ANAL. SCI.

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Atmospheric H2O2 is typically determined by enzymatically mediated fluorogenic reactions that do not discriminate between H2O2 and organic peroxides. Reactions of Ti(IV) with H2O2 has also been the basis of colorimetric measurements of H2O2 but is too insensitive. A more sensitive determination is possible with the Ti(IV)-4-(2-pyridylazo)resorcinol (PAR) complex, however, unreacted PAR must be chromatographically separated. A titanium(IV)-porphyrin complex, oxo [5,10,15,20-tetra(4-pyridyl)porphyrinato]titanium(IV) [TiO(tpypH4) 4+ ], (TiTPyP) was introduced for the measurement of aqueous H2O2. In this paper, we show that TiTPyP can be used for measuring H2O2(g), it does not respond to CH3HO2. With a proper membrane collector, practically there is no interference from concurrently present gaseous SO2 and O3. The approach permits a S/N = 3 limit of detection (LOD) of 26 pptv with a 50 mm path liquid core waveguide (LCW) absorbance detector and a light emitting diode based light source. This is adequate for real atmospheric measurements.

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