Homogeneous chemiluminescent measurement of nitric oxide with ozone.  Implications for continuous selective monitoring of gaseous air pollutants

Fontijn, Arthur; Sabadell, Alberto J.; Ronco, Richard J.

doi:10.1021/ac60288a034

Cited by 437 publications

(166 citation statements)

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“…This forms the basis of the chemiluminescence analysis of NO (Drummond et al, 1985;Fontijn et al, 1970;Kelly et al, 1980;Peterson and Honrath, 1999). The number of photons emitted by the decay of excited NO * 2 to NO 2 is proportional to the NO present before reaction with O 3 (Drummond et al, 1985).…”

Section: Introductionmentioning

confidence: 99%

“…The number of photons emitted by the decay of excited NO * 2 to NO 2 is proportional to the NO present before reaction with O 3 (Drummond et al, 1985). The photons emitted are detected by a cooled photomultiplier tube (PMT) with the sample under low pressure (to maximize the fluorescence lifetime of the NO * 2 ) in order to yield a signal which is linearly proportional to the number density of NO in the sample gas (Fontijn et al, 1970). Quenching of the NO 2 excited state occurs due to a range of atmospheric compounds (N 2 , Ar, CO, CO 2 , CH 4 , O 2 , He, H 2 , and H 2 O) (Clough and Thrush, 1967;Drummond et al, 1985;Zabielski et al, 1984).…”

Section: Introductionmentioning

confidence: 99%

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Interferences in photolytic NO<sub>2</sub> measurements: explanation for an apparent missing oxidant?

et al. 2016

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Abstract. Measurement of NO 2 at low concentrations (tens of ppts) is non-trivial. A variety of techniques exist, with the conversion of NO 2 into NO followed by chemiluminescent detection of NO being prevalent. Historically this conversion has used a catalytic approach (molybdenum); however, this has been plagued with interferences. More recently, photolytic conversion based on UV-LED irradiation of a reaction cell has been used. Although this appears to be robust there have been a range of observations in low-NO x environments which have measured higher NO 2 concentrations than might be expected from steady-state analysis of simultaneously measured NO, O 3 , j NO 2 , etc. A range of explanations exist in the literature, most of which focus on an unknown and unmeasured "compound X" that is able to convert NO to NO 2 selectively. Here we explore in the laboratory the interference on the photolytic NO 2 measurements from the thermal decomposition of peroxyacetyl nitrate (PAN) within the photolysis cell. We find that approximately 5 % of the PAN decomposes within the instrument, providing a potentially significant interference. We parameterize the decomposition in terms of the temperature of the light source, the ambient temperature, and a mixing timescale (∼ 0.4 s for our instrument) and expand the parametric analysis to other atmospheric compounds that decompose readily to NO 2 (HO 2 NO 2 , N 2 O 5 , CH 3 O 2 NO 2 , IONO 2 , BrONO 2 , higher PANs). We apply these parameters to the output of a global atmospheric model (GEOS-Chem) to investigate the global impact of this interference on (1) the NO 2 measurements and (2) the NO 2 : NO ratio, i.e. the Leighton relationship. We find that there are significant interferences in cold regions with low NO x concentrations such as the Antarctic, the remote Southern Hemisphere, and the upper troposphere. Although this interference is likely instrument-specific, the thermal decomposition to NO 2 within the instrument's photolysis cell could give an at least partial explanation for the anomalously high NO 2 that has been reported in remote regions. The interference can be minimized by better instrument characterization, coupled to instrumental designs which reduce the heating within the cell, thus simplifying interpretation of data from remote locations.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interferences in photolytic NO<sub>2</sub> measurements: explanation for an apparent missing oxidant?

et al. 2016

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“…The reaction of NO with ozone results in the emission of light, and this light (emitted in proportion to the NO concentration) is the basis for one of the most accurate NO assays available (Fontijn et al, 1997;Laitinen et al, 1993). NO production was indirectly quantified by measuring nitrate/nitrite and S-nitrose compounds (NOx) using an ozone chemiluminescence-based method.…”

Section: No Measurementmentioning

confidence: 99%

Endogenous Nitric Oxide Can Act as Beneficial or Deleterious in the Hypoxic Lung Depending on the Reoxygenation Time

Rus

Molina

Peinado

et al. 2010

The Anatomical Record

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Nitric oxide (NO) has been implicated in many pathophysiological situations in the lung, including hypoxia/reoxygenation. This work seeks to clarify the current controversy concerning the double protective/toxic role of endogenous NO under hypoxia/reoxygenation situations in the lung by using a nitric oxide synthase (NOS) inhibitor, in a novel approach to address the problems raised from assaults under such circumstances. A follow-up study was conducted in Wistar rats submitted to hypoxia/ reoxygenation (hypoxia for 30 min; reoxygenation of 0 h, 48 h, and 5 days), with or without prior treatment using the nonselective NOS inhibitor L-NAME (1.5 mM, in drinking water). Lipid peroxidation, apoptosis level, protein nitration, in situ NOS activity and NO production (NOx) were analyzed. This is the first work to focus on the time-course effects of L-NAME in the adult rat lung submitted to hypoxia/reoxygenation. The results showed that after L-NAME administration, in situ NOS activity was almost completely eliminated and consequently, NOx levels fell. Lipid peroxidation and the percentage of apoptotic cells rose at the earliest reoxygenation time (0 h), but decreased in the later period (48 h and 5 days). Also nitrated protein expression decreased at 48 h and 5 days posthypoxia. These results suggest that NOS-derived NO exerts two different effects on lung hypoxia/reoxygenation injury depending on the reoxygenation time: NO has a beneficial role just after the hypoxic stimulus and a deleterious effect in the later reoxygenation times. Moreover, we propose that this dual role of NO depends directly on the producer NOS isoform.

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“…The official methods 1 in Japan for the measurement of NO2 are the Saltzman method 2 and the chemiluminescence method. 3 But these methods are more expensive than the NO2 monitoring system used in this work. A sodium arsenite method, 4 electrochemical gas sensor [5][6][7] and irreversible sensor 8 are reported for the NO2 detection.…”

Section: Introductionmentioning

confidence: 99%

Development of a Detection Tablet for a Portable NO2 Monitoring System

et al. 2006

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Homogeneous chemiluminescent measurement of nitric oxide with ozone. Implications for continuous selective monitoring of gaseous air pollutants

Cited by 437 publications

References 8 publications

Interferences in photolytic NO<sub>2</sub> measurements: explanation for an apparent missing oxidant?

Interferences in photolytic NO<sub>2</sub> measurements: explanation for an apparent missing oxidant?

Endogenous Nitric Oxide Can Act as Beneficial or Deleterious in the Hypoxic Lung Depending on the Reoxygenation Time

Development of a Detection Tablet for a Portable NO2 Monitoring System

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Homogeneous chemiluminescent measurement of nitric oxide with ozone. Implications for continuous selective monitoring of gaseous air pollutants

Cited by 437 publications

References 8 publications

Interferences in photolytic NO&lt;sub&gt;2&lt;/sub&gt; measurements: explanation for an apparent missing oxidant?

Interferences in photolytic NO&lt;sub&gt;2&lt;/sub&gt; measurements: explanation for an apparent missing oxidant?

Endogenous Nitric Oxide Can Act as Beneficial or Deleterious in the Hypoxic Lung Depending on the Reoxygenation Time

Development of a Detection Tablet for a Portable NO2 Monitoring System

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Interferences in photolytic NO<sub>2</sub> measurements: explanation for an apparent missing oxidant?

Interferences in photolytic NO<sub>2</sub> measurements: explanation for an apparent missing oxidant?