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  • Title: Validation of a simpler method for determination of atmospheric sulfur dioxide.
    Author: Hoogenboom BE, Hynes RW, McJilton CE, Stevens JB.
    Journal: Am Ind Hyg Assoc J; 1986 Sep; 47(9):552-5. PubMed ID: 3766399.
    Abstract:
    The determination of atmospheric sulfur dioxide as aqueous bisulfite using 5,5'-dithiobis (2-nitrobenzoic acid) (DTNB) was validated as a simple, rapid and reliable procedure. Standard sulfur dioxide concentrations in air (0-2.6 ppm) were generated by means of a permeation device. Sulfur dioxide from air samples was absorbed in pH 7 phosphate buffer and determined as bisulfite. The mean percentage recovery of sulfur dioxide is 101.4; the slope of the validation line determined by linear regression analysis (calculated vs. found) is 1.014 ppm found/calculated (1.4% absolute error; 0.9976 correlation coefficient).
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