A method for simultaneous determination of H2s and SO2 in flue gases

Boström, Carl-Elis; Brosset, Cyrill

doi:10.1016/0004-6981(69)90060-2

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…Chemical analysis. Analysis of hydrogen sulfide was carried out once for every Sand session by employing the gel technique method described by Broström and Brosset (1969). Samples were taken immediately in front of the dosing capillaries.…”

Section: Methodsmentioning

confidence: 99%

A symmetric and an asymmetric model for the equal-sensation function in olfaction

Svensson

1977

Perception & Psychophysics

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Data from various intramodel matehing experiments in olfaetion were analyzed with regard to asymmetrie and an asymmetrie model for the equal-sensation funetion. The asymmetrie model was diseussed in relation to the symmetrie model. In all, 11 equal-sensation funetions were investigated, and of these 9 were with different pairs of odorants. The following odorants were investigated: hydrogen sulfide, pyridine, dimethyl disulfide, and five odorants obtained by different eombustion procedures of animal manure. It was found that the equal-sensation funetion ean be written in the following asymmetric form: +i = bik A. +k bik , lf'i = lf'k or symmetrie form: I-bik bik +i = C. +k ' lf'i = lf'k, where +i and +k are stimuli expressed in multiples of respeetive absolute thresholds, Aand C are general eonstants invariant of experimental matehing method and matehed attribute (pereeived unpleasantness or intensity). The eonstants Aand C were ealculated both for group data and individual data. The asymmetrie form of the equal-sensation function was interpreted in terms of relativity and the symmetrie form in terms of measurement.

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Section: Methodsmentioning

confidence: 99%

A symmetric and an asymmetric model for the equal-sensation function in olfaction

Svensson

1977

Perception & Psychophysics

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“…The concentration of hydrogen sulphide was determined by the gel technique described by Bostrom and Brosset (1969). Standard curves are available by which the results of the gel technique can be transformed into concentration values obtained by the wet chemical technique reported by Jacobs, Braverman, and Hochheiser (1957).…”

Section: Methodsmentioning

confidence: 99%

A quantitative principle of perceived intensity summation in odor mixtures.

Berglund¹,

Berglund²,

Lindvall³

et al. 1973

Journal of Experimental Psychology

102

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A summation principle for perceived intensity of odors was investigated for mixtures of dimethyl disulphide, hydrogen sulphide, and pyridine. Mixtures were made by forming all possible pairs of these 3 compounds each appearing at S levels of perceived intensity. Perceived intensity of the individual odorants as well as the mixtures were scaled with a magnitude-estimation procedure. Results clearly showed that theoretical values calculated according to a vector model of odor interaction were in good agreement with the empirically obtained perceived intensity values for all mixtures. For components (individual odorants) equal in perceived intensity, a direct proportionality between perceived intensity of the mixture and the arithmetic sum of the perceived intensity of components was found. This result, which conforms to a special case of the vector model, is in agreement with findings reported earlier. The vector model also has practical relevance for problems of odorous air pollution.

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“…This instrument was repeatedly calibrated during each experimental session by use of standard samples of n-butanol (5,000 ppm) in Mylar plastic bags. The concentration of hydrogen sulfide was determined by the gel technique described by Bostrom and Brosset (1969).…”

Section: Stimulimentioning

confidence: 99%

Separate and joint scaling of perceived odor intensity ofn-butanol and hydrogen sulfide

Berglund

Lindvall

1978

Perception & Psychophysics

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To determine which combination of scaling method and experimental procedure is optimal for measuring perceived odor intensity, the intensity perception of one odorous substance was scaled both separately and together with a second odorous substance in the same session. The methods used were magnitude estimation with and without a standard reference and cross-modal matching with finger span. The results show that separate and joint scalings of n-butanol and H2S give identical scales, regardless of scaling method. Different results are obtained in magnitude estimations with a homoquality, a heteroquality, and no standard. From these results, one would not expect to find a single true power function independent of method. Cross-modal matching with finger span may be the best choice for odor intensity scaling, since it results in the widest response range, thereby giving the best resolution.

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A method for simultaneous determination of H2s and SO2 in flue gases

Cited by 6 publications

References 1 publication

A symmetric and an asymmetric model for the equal-sensation function in olfaction

A symmetric and an asymmetric model for the equal-sensation function in olfaction

A quantitative principle of perceived intensity summation in odor mixtures.

Separate and joint scaling of perceived odor intensity ofn-butanol and hydrogen sulfide

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