Colorimetric indicator solution for the detection of nitrogen dioxide and method of analysis
Abstract
Abstract SOLUBLE TABLETS SUITABLE FOR PROVIDING AN INDICATOR SOLUTION OF THE COLORIMETRIC TYPE FOR QUANTITATIVELY MEASURING THE NITROGEN DIOXIDE CONTAMINATION IN AN ATMOSPHERE ARE DISCLOSED. THE INDICATOR SOLUTION, WHICH HAS A PH OF NOT MORE THAN 4.0, IS CONVENIENTLY PREPARED BY DISSOLVING A TABLET CONTAINING A DIAZOTIZING AGENT MECHANICALLY SUPPORTED IN A SUITABLE MANNER AND A SECOND TABLET CONTAINING A COUPLING AGENT ALSO MECHANICALLY SUPPORTED IN A SUITABLE MANNER IN A PREDETERMINED AMOUNT OF WATER. A MEASURED SOLUTION IS TRANSFERRED TO AN ABSORPTION BUBBLER OF THE TYPE CUSTOMARILY EMPLOYED IN COLORIMETRIC ANALYSIS, THE REAGENT SOLUTION IS EXPOSED TO METERED QUANTITIES OF AIR CONTAINING NITROGEN DIOXIDE AS A CONTAMINANT THUS RESULTING IN THE SAMPLE THUS EXPOSED IN A COLORIMETER, THE NITROGEN DIOXIDE CONTENT IS READILY MEASURED.
Inventors
- 👤 Avery B Smith
- 👤 Ralph R Hennig
- 👤 Abraham J Kurtz
- 👤 Gregory Pantchenko
Bibliographic Details
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