Method of detecting sulfur dioxide

Chemistry: analytical and immunological testing – Sulfur containing – Sulfur dioxide

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324308, 324315, 436172, 436173, 556410, 556428, C07F 710, G01N 2164, G01N 2177, G01N 2408

Patent

active

044991908

ABSTRACT:
(CH.sub.3).sub.3 SiNSO is produced by the reaction of ((CH.sub.3).sub.3 Si).sub.2 NH with SO.sub.2. Also produced in the reaction are ((CH.sub.3).sub.3 Si).sub.2 O and a new solid compound [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ]. Both (CH.sub.3).sub.3 SiNSO and [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ] have fluorescent properties. The reaction of the subject invention is used in a method of measuring the concentration of SO.sub.2 pollutants in gases. By the method, a sample of gas is bubbled through a solution of ((CH.sub.3).sub.3 Si).sub.2 NH, whereby any SO.sub.2 present in the gas will react to produce the two fluorescent products. The measured fluorescence of these products can then be used to calculate the concentration of SO.sub.2 in the original gas sample. The solid product [NH.sub.4][(CH.sub.3).sub.3 SiOSO.sub.2 ] may be used as a standard in solid state NMR spectroscopy.

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Davis et al., Chemical Abstracts, vol. 93, 1980, p. 989, No. 93, 71846m.
Bennett et al., Chemical Abstracts, vol. 95, 1981, p. 681, No. 95, 150743v.
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Debrun et al., Chem. Abstracts, vol. 78, 1973, p. 267, No. 151907n.

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