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Instruments > In Situ/Laboratory Instruments > Chemical Meters/Analyzers > URI Instrument

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URI Instrument  

Definition

  • Measurements of hydrogen peroxide (H2O2) and methylhydroperoxide (CH3OOH) will be made using a technique described by Lee et al., 1995. This technique has successfully been employed as a method of quantifying hydroperoxide concentrations aboard both the DC-8 and P3-B during previous PEM missions. Aqueous collection using continuous flow glass scrubbing coils allows for 99% collection efficiency for H2O2 and approximately 60% for CH3OOH. Quantitative analysis aboard both planes will be conducted using high performance liquid chromatography (HPLC) as described by Lee et al., 1995. Hydroperoxides are separated using reverse phase HPLC followed by a derivatization reaction between the particular hydroperoxide and peroxidase producing a fluorescent dimer (6,6'-dihydroxy-3,3'biphenyldiacetic acid). The production of this dimer is proportional the quantity of the reacting hydroperoxide. (en)

Broader concept

Change note

  • 2023-04-13 15:45:17.0 [sritz] Insert Concept add broader relation (URI Instrument [2ca26840-6a60-4c96-a17f-c86a2e652835,1276541] - Chemical Meters/Analyzers [3d25724b-832f-4a61-b0b2-4f2ccecdba94,1267692]);
  • 2023-04-13 15:47:34.0 [sritz] insert AltLabel (id: null category: primary text: University of Rhode Island Peroxides and Formaldehyde Instrument language code: en); insert Definition (id: null text: Measurements of hydrogen peroxide (H2O2) and methylhydroperoxide (CH3OOH) will be made using a technique described by Lee et al., 1995. This technique has successfully been employed as a method of quantifying hydroperoxide concentrations aboard both the DC-8 and P3-B during previous PEM missions. Aqueous collection using continuous flow glass scrubbing coils allows for 99% collection efficiency for H2O2 and approximately 60% for CH3OOH. Quantitative analysis aboard both planes will be conducted using high performance liquid chromatography (HPLC) as described by Lee et al., 1995. Hydroperoxides are separated using reverse phase HPLC followed by a derivatization reaction between the particular hydroperoxide and peroxidase producing a fluorescent dimer (6,6'-dihydroxy-3,3'biphenyldiacetic acid). The production of this dimer is proportional the quantity of the reacting hydroperoxide. language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/2ca26840-6a60-4c96-a17f-c86a2e652835

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