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A sensitive fluorimetric method for the determination of nitrogen oxides (NO x : NO+NO 2 ) in air is described. Nitrogen dioxide (nitrogen monoxide was previously converted to nitrogen dioxide in oxide tubes) was aspirated through a fritted glass bubble at a flow rate of 500 ml min -1 for 120 min and fixed as nitrite, using 0.1 N NaOH as a trapping solution with the empirical...
A spectrofluorimetric determination of sulfite based on the co-quenching effect of sulfite and formaldehyde on the fluorescence of a red-region dye, tetra-substituted amino aluminum phthalocyanine (TAAlPc), is described. The relationship between the fluorescence quenching of TAAlPc and the concentration of sulfite is linear over the concentration range of 8-240ngml -1 under optimum conditions...
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