Automated fluorometric method for hydrogen peroxide in air

Lazrus, A. L.; Kok, Gregory L.; Lind, John A.; Gitlin, Sonia N.; Heikes, Brian G.; Shetter, R. E.

doi:10.1021/ac00294a024

Cited by 304 publications

(129 citation statements)

References 24 publications

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“…H 2 O 2 and CH 3 OOH * were measured with a wet chemical system based on the technique described by Lazrus et al (1985Lazrus et al ( , 1986. Ambient air is collected via a 1/2 PFA tubing embedded inside a stainless steel inlet system that is mounted front-facing on a side window of a Learjet 35A of GFD (Gesellschaft für Flugzieldarstellung, Hohn, Germany).…”

Section: Measurements Of H 2 O 2 and Ch 3 Ooh *mentioning

confidence: 99%

Distribution of hydrogen peroxide and formaldehyde over Central Europe during the HOOVER project

et al. 2011

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Abstract. In this study we report measurements of hydrogen peroxide (H 2 O 2 ), methyl hydroperoxide* (MHP* as a proxy of MHP based on an unspecific measurement of total organic peroxides) and formaldehyde (HCHO) from the HO x OVer EuRope (HOOVER) project (HO x = OH+HO 2 ). HOOVER included two airborne field campaigns, in October 2006 and July 2007. Measurement flights were conducted from the base of operation Hohn (Germany, 54 • N, 9 • E) towards the Mediterranean and to the subpolar regions over Norway. We find negative concentration gradients with increasing latitude throughout the troposphere for H 2 O 2 and CH 3 OOH * . In contrast, observed HCHO is almost homogeneously distributed over central and northern Europe and is elevated over the Mediterranean. In general, the measured gradients tend to be steepest entering the Mediterranean region, where we also find the highest abundances of the 3 species. Mixing ratios of these tracers generally decrease with altitude. H 2 O 2 and CH 3 OOH * show maxima above the boundary layer at 2-5 km, being more distinct over southern than over northern Europe.We also present a comparison of our data with simulations by two global 3-D-models, MATCH-MPIC and EMAC, and with the box model CAABA. The models realistically represent altitude and latitude gradients for both HCHO and hydroperoxides (ROOH). In contrast, the models have problems reproducing the absolute mixing ratios, in particular of H 2 O 2 . Large uncertainties about retention coefficients and Correspondence to: H. Fischer (horst.fischer@mpic.de) cloud microphysical parameters suggest that cloud scavenging might be a large source of error for the simulation of H 2 O 2 . A sensitivity study with EMAC shows a strong influence of cloud and precipitation scavenging on the budget of H 2 O 2 as simulations improve significantly with this effect switched off.

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Section: Measurements Of H 2 O 2 and Ch 3 Ooh *mentioning

confidence: 99%

Distribution of hydrogen peroxide and formaldehyde over Central Europe during the HOOVER project

et al. 2011

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“…Measurement of hydrogen peroxide Among several methods for measurement of hydrogen peroxide, we adopted a following fluorometric method (Guilbault et al ., 1968) where p-hydroxyphenyl acetic acid (POPHA) was used as the substrate of peroxidase shown in reaction (1) An automated method based on this reaction was proposed with using a Technicon Auto analyzer system (Lazrus et al, 1986). Since air segmentation is required in the Technicon system, we changed to the flow injection analysis, which improved in reducing numbers of flow lines (the system is much simpler than that of Lazrus et al (1986), and thus, is much convenient to be used on shipboard) and run time (3 min.…”

Section: Methodsmentioning

confidence: 99%

“…Since air segmentation is required in the Technicon system, we changed to the flow injection analysis, which improved in reducing numbers of flow lines (the system is much simpler than that of Lazrus et al (1986), and thus, is much convenient to be used on shipboard) and run time (3 min. for one sample).…”

Section: Methodsmentioning

confidence: 99%

Diurnal and seasonal distribution of hydrogen peroxide in seawater of the Seto Inland Sea.

et al. 1993

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Hydrogen peroxide was determined in seawater at the Hiroshima Bay, the Seto Inland Sea under sunny conditions. Concentration of hydrogen peroxide was in accordance with the intensity of the solar radiation. Photochemical production under strong biological activity might be responsible for the pro files of the diurnal and seasonal variation of hydrogen peroxide concentration.The spatial distribution of hydrogen peroxide in the Seto Inland Sea gave a good correlation with salinity, suggesting that the photosensitizer to produce hydrogen peroxide was substances brought from river waters.Hydrated electron as a possible precursor of hydrogen peroxide in the photochemical reaction was generated in seawater collected at the Seto Inland Sea by means of irradiating the third harmonic wave of the YAG laser (355 nm: 60 mJ): The amount generated showed a positive correlation against total organic carbon (TOC) and dissolved organic carbon (DOC) in seawater. This correlation was greately improved by the addition of EDTA. The EDTA treatment suggests the existence of some species obstructed the hydrogen peroxide production. Also, this correlation coefficient was improved when tak ing fluorescent matter instead of TOC or DOC.

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“…The H 2 O 2 instrument in the MCL was of the fluorimetric/ enzymatic type according to Lazrus et al 12 Due to a malfunction, the instrument did not operate during the ground-based checks. Instead, standard H 2 O 2 solutions were prepared from a stock solution which was titrated with a standard KMnO 4 solution and injected into the H 2 O 2 instruments.…”

Section: Mobile Calibration Laboratory (Mci)mentioning

confidence: 99%

Airborne Chemical and Meteorological Measurements Made During the 1992 TRACT Experiment: Quality Control and Assessment

Kanter

Šlemr²,

Mohnen³

et al. 1996

Journal of the Air & Waste Management Association

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Three-dimensional fields of chemical and meteorological parameters over southwestern Germany were obtained by five aircraft during the TRACT experiment in September 1992. To ensure the homogeneous quality of the data and its compliance with the needs of data users, an extensive quality control and assessment (QA/QC) plan was devised and executed. The quality of O 3 , NO, NO y , SO 2 , and H 2 O 2 measurements was assessed by intercomparisons at ground level against a set of standard instruments and in flight against each other. In-flight intercomparisons of air pressure, temperature, and humidity served also to assess the quality of meteorological measurements. The data quality objectives (DQOs) for TRACT were met with respect to all air quality parameters, except air temperature and humidity. The latter two measurements by different aircraft differed by a constant offset which can be corrected for.

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Automated fluorometric method for hydrogen peroxide in air

Cited by 304 publications

References 24 publications

Distribution of hydrogen peroxide and formaldehyde over Central Europe during the HOOVER project

Distribution of hydrogen peroxide and formaldehyde over Central Europe during the HOOVER project

Diurnal and seasonal distribution of hydrogen peroxide in seawater of the Seto Inland Sea.

Airborne Chemical and Meteorological Measurements Made During the 1992 TRACT Experiment: Quality Control and Assessment

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