Measurement of Trace Levels of Atmospheric Sulfur Dioxide with a Gold Film Sensor

Hisamatsu, Yosiharu; Liu, Ping; Dasgupta, Purnendu Κ.

doi:10.1080/08940630.1989.10466585

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…This bonding mode in turn reduces electron density at the metal center, hence the increase in formal oxidation potentials of SO 2 adducts. 3 are within 59 AE 6 mV) of a diffusion controlled system, as has been reported for related compounds [19]. The formal potential values of the complexes are 345, 345 and 351 mV/Ag-AgCl for the F, OCH 3 and CH 3 substituents, respectively.…”

Section: Methodsmentioning

confidence: 87%

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Organic Phase Cyclopentadienylnickelthiolate Sensor System for Electrochemical Determination of Sulfur Dioxide

et al. 2004

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H NMR spectroscopic analyses show that the formation of SO 2 adducts causes the perturbation of the electronic density of the nickel metal center, indicated by shifts in the E8' values of the Ni II/III redox couple that is dependent on SO 2 concentration. The detection limits of the resulting organic phase electrochemical gas sensor system was as low as 0.56 ppm SO 2 for the fluoro complex, while the linear range was as high as 700 -2000 ppm SO 2 for the amino complex.

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Section: Methodsmentioning

confidence: 87%

“…A number of instrumental methods are available to monitor SO 2 levels in the environment. These include ultraviolet fluorescence [2], flame photometry [3] and ion chromatography [4,5]. These instrumental techniques require sample treatment steps that provide additional scope for error.…”

Section: Introductionmentioning

confidence: 99%

Organic Phase Cyclopentadienylnickelthiolate Sensor System for Electrochemical Determination of Sulfur Dioxide

et al. 2004

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“…3 The conventional methods for the determination of SO 2 in environmental and process streams are performed using expensive gas chromatography with single-ame photometric or pulsed uorescence detectors. [4][5][6] Ion chromatography, 7,8 surface acoustic wave, 9 and quartz crystal microbalance 10 have also been reported. These techniques, however, have not been widely used because of high-cost, complicated and time-consuming operation.…”

Section: Introductionmentioning

confidence: 99%

An ionic liquid-mediated electrochemiluminescent sensor for the detection of sulfur dioxide at the ppb level

Chen¹,

Zhang²,

Ren³

et al. 2013

Analyst

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A novel portable SO2 gas sensor based on ionic liquid (IL) mediated electrochemiluminescence (ECL) for detecting SO2 at the ppb levels has been developed. The sensing system for SO2 detection is based on the strong quenching effect of SO2 on the ECL of the tris(2,2'-bipyridine)ruthenium(ii) (Ru(bpy)3(2+))/O2 coreactant system in the IL film. Over the potential window between -1.0 and +1.3 V, O2 can act as an effective coreactant for Ru(bpy)3(2+) ECL in ILs, giving a bright ECL emission. The ECL of the Ru(bpy)3(2+)/O2 system can be strongly inhibited by SO2 through the direct quenching of the excited state of the luminophore, i.e. Ru(bpy)3(2+)*, by SO2 molecules. The inhibited ECL intensity is proportional to the concentration of SO2 in the range from 40 to 2000 ppb with a detection limit of 20 ppb. The proposed SO2 ECL sensor can be operated at room temperature and shows high selectivity, good reproducibility and long-term stability in a dry atmosphere.

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“…In fact, the detection limits normally quoted for electrochemical SO 2 sensors (the majority based on amperometric cells) lie in the range from 1 to 5 ppm. The analysis of air samples for volatile compounds such as SO 2 in environmental and process control laboratories is still generally performed with gas chromatography using single-flame photometric (FPD) or pulsed fluorescence detectors. , Conductometric measurements using a Hg translation method, electrolytic conductivity detection, and ion chromatography 13,14 have also been reported. These techniques are, however, expensive and cumbersome to use.…”

mentioning

confidence: 99%

Electrochemical Sensor for the Detection of SO₂ in the Low-ppb Range

1999

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The development of an improved electrochemical sensor for the detection of concentrations of atmospheric sulfur dioxide in the low-ppb range is described. The sensor is based on a porous Au−solid polymer electrolyte sensing electrode which is in direct contact with the gas-containing atmosphere. Although the cell design is not new, it is demonstrated that, by careful selection of component materials and experimental conditions, the determination of trace concentrations of SO2 in air is possible with detection limits of approximately 1 ppb. The use of a strong anion exchange membrane as the solid polymer electrolyte is discussed and compared with the performance of Nafion. Cross sensitivities of the sensor to the major inorganic gaseous species found in the troposphere are also presented.

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Measurement of Trace Levels of Atmospheric Sulfur Dioxide with a Gold Film Sensor

Cited by 4 publications

References 9 publications

Organic Phase Cyclopentadienylnickelthiolate Sensor System for Electrochemical Determination of Sulfur Dioxide

Organic Phase Cyclopentadienylnickelthiolate Sensor System for Electrochemical Determination of Sulfur Dioxide

An ionic liquid-mediated electrochemiluminescent sensor for the detection of sulfur dioxide at the ppb level

Electrochemical Sensor for the Detection of SO₂ in the Low-ppb Range

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Measurement of Trace Levels of Atmospheric Sulfur Dioxide with a Gold Film Sensor

Cited by 4 publications

References 9 publications

Organic Phase Cyclopentadienylnickelthiolate Sensor System for Electrochemical Determination of Sulfur Dioxide

Organic Phase Cyclopentadienylnickelthiolate Sensor System for Electrochemical Determination of Sulfur Dioxide

An ionic liquid-mediated electrochemiluminescent sensor for the detection of sulfur dioxide at the ppb level

Electrochemical Sensor for the Detection of SO2 in the Low-ppb Range

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Product

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Electrochemical Sensor for the Detection of SO₂ in the Low-ppb Range