大気中の塩化水素ガスの簡易測定法の開発

概要

論文の詳細を見る
This paper describes a new method to measure individual levels of atmospheric hydrogen chloride gas by use of a simple personal sampler. A main principle of the method is based on the discoloration of a colored silver complex by removal of Ag^+ from the complex as AgCl. In order to differentiate HCl from NaCl, a pH indicator is also included in the method. As a result of a combination of discoloration, the sensitivity of the method increased significantly. A complexing agent, 4-(3,5-dibromo-2-pyridylazo)-N, N-diethylaniline (PAEA) and the pH indicator, bromothymol blue (BTB) are immobilized in aqueous polyacrylamide gel (PAG) by inpregnating gels in the solution of these reagents. The gels thus prepared, HCl-PAG, are held in an appropriate carrying case and used in the same manner as a filter badge. The color change from blue to yellow could be observed at higher than 14.6 μg of hydrogen chloride. The advantage of this method is that it enables to make semiquantitative determination of hydrogen chloride by simple comparison of color change with a standard color chart instead of using spectrophotometer.
公益社団法人日本薬学会の論文
1990-12-31