New sensor for ecological determination of benzene in ambient air

Schechter, Israël; Schroeder, Hartmut; Kompa, K. L.

doi:10.1021/ac00062a020

Cited by 14 publications

(10 citation statements)

References 18 publications

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“…Gas chromatography-flame ion detection (GC-FID) and gas chromatography-mass spectrometry (GC-MS) have been used for the analysis of benzene, toluene, ethyl benzene and xylene (BTEX) in waste water (16). Multiphoton ionization (MPI) has great sensitivity and high selectivity (17). Moreover, there are other methods, such as solid phase microextraction (SPME) with activated charcoal, to determine benzene vapour in air (18).…”

Section: Introductionmentioning

confidence: 99%

Development of a benzene vapour sensor utilizing chemiluminescence on Y₂O₃

et al. 2008

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Chemiluminescence (CL) was observed when benzene vapour passed through the surface of Y(2)O(3), TiO(2), Y(2)O(3)-V(2)O(5), TiO(2)-Y(2)O(3), Y(2)O(3)-Cr(2)O(3), Y(2)O(3)-Al(2)O(3) and TiO(2)-Al(2)O(3), with air as the carrier gas. The strongest CL intensity was found with Y(2)O(3) as the catalyst. A novel benzene sensor based on this kind of CL was developed. Quantitative analysis was performed at the wavelength of 425 nm. Under optimal conditions, CL intensity was directly proportional to the concentration of benzene vapour. The linear range was 4-7018 mg/m(3)(r = 0.9981, n = 11), with a detection limit of 1 mg/m(3) (the signal:noise ratio was 3). This gas sensor can work continuously for >80 h and has been successfully applied to the real-time determination of benzene vapour.

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Section: Introductionmentioning

confidence: 99%

Development of a benzene vapour sensor utilizing chemiluminescence on Y₂O₃

et al. 2008

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“…A rather new and uncommon analytical technology is Multiphoton Electron Extraction Spectroscopy (MEES), which has been based of previous analytical applications of multiphoton ionization under ambient conditions: starting with gas phase applications [5][6][7][8], liquids [9], aerosols [10][11][12], and solid surfaces [13][14][15][16][17][18][19][20][21]. MEES is a quantitative analytical spectroscopy, based on detection of photoelectrons extracted in multiphoton process, as a function of laser irradiation wavelength.…”

Section: Introductionmentioning

confidence: 99%

Authentication and Testing of Banknotes Using Laser Multiphoton Electron Extraction Spectroscopy (MEES)

2021

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In laser multiphoton electron extraction spectroscopy (MEES), the photo-charges extracted from a surface by a pulsed laser beam are recorded as a function of laser wavelength. We report the first application of this spectroscopy to banknotes. Various banknotes from different countries, authentic and counterfeit, have been tested. The results indicate that MEES spectra are both informative (many peaks) and reproducible. The spectra allow for clear distinction between authentic and counterfeit banknotes. Actually, MEES provides a unique fingerprint of the banknotes, so that distinction between various forgery methods (printer used) is also possible.

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“…Recently, such a new detection system has been proposed for an on-line analysis of aromatic compounds in ambient air. [13][14][15][16] A fast-conductivity method, where the MPI induced photoionization current is amplified and recorded by reasonably straightforward and low-cost experimental arrangement, has been successfully applied to a variety of systems of considerable analytical intere~t. ""~ The most important fields of application, especially when on-line and in-situ abilities of the method are on demand, are found in environmental studies of atmospheric, water and soil pollutants.…”

Section: Introductionmentioning

confidence: 99%

Photoionization Fast-Conductivity Technique for Analysis of Traffic Contaminated Soils

Gridin

Bulatov

Korol

et al. 1997

Instrumentation Science & Technology

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A time-resolved detection of the multiphoton ionization induced photocurrents was developed and applied to map a near-field contamination profile of a year-around-active traffic road. Main advantages of the proposed method are in its simplicity and rapidity. No chemical sample preparation is required: analysis is carried out in ambient conditions and the technique can be easily automated. A fast screening of contaminated soils is feasible. The soil samples collected at various radial distances, R, have produced, as method's readout, the photoionization charges, Q.These originate from combustion by-products and were found to decrease according to 1/Q -R. This finding is supported by a straightforward contamination model that largely avoids an obvious complexity associated with the precise mathematical treatment of such a pollution source. We estimate that, at R=50 m the concentration of organic contamination is as high as O.lpg/g.

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New sensor for ecological determination of benzene in ambient air

Cited by 14 publications

References 18 publications

Development of a benzene vapour sensor utilizing chemiluminescence on Y₂O₃

Development of a benzene vapour sensor utilizing chemiluminescence on Y₂O₃

Authentication and Testing of Banknotes Using Laser Multiphoton Electron Extraction Spectroscopy (MEES)

Photoionization Fast-Conductivity Technique for Analysis of Traffic Contaminated Soils

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New sensor for ecological determination of benzene in ambient air

Cited by 14 publications

References 18 publications

Development of a benzene vapour sensor utilizing chemiluminescence on Y2O3

Development of a benzene vapour sensor utilizing chemiluminescence on Y2O3

Authentication and Testing of Banknotes Using Laser Multiphoton Electron Extraction Spectroscopy (MEES)

Photoionization Fast-Conductivity Technique for Analysis of Traffic Contaminated Soils

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Development of a benzene vapour sensor utilizing chemiluminescence on Y₂O₃

Development of a benzene vapour sensor utilizing chemiluminescence on Y₂O₃