Abstract
It is shown that 10-chloro-9,10-dihydrophenarsazine and dibenz[b, f][1,4]oxazepine can be determined with the use of indicator tubes containing 4-chloro-5,7-dinitrobenzofurazan and its N-oxide immobilized on silica gel. The conditions for the determination of these substances in air are determined. The following effects are studied: the nature, particle size, and layer thickness of the support; the nature and concentration of the analytical reagent in the chemisorption layer; the rate and time of air aspiration through the indicator tube; and various components of the sample matrix. The limit of visual detection of the toxic substances is 0.05 mg/m3.
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Evgen'ev, M.I., Garmonov, S.Y., Belov, P.E. et al. Test Method for the Determination of Toxic Irritants in Air. Journal of Analytical Chemistry 58, 485–488 (2003). https://doi.org/10.1023/A:1024038400310
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DOI: https://doi.org/10.1023/A:1024038400310