Design and built simple air sampling device for NO 2, SO 2, and NH 3 from air ambient

The increasing of human care to common air contamination caused the demanding of air analyzing and air sampling devices increasingly. The purpose of this research is to make simple air sampling device which are easy-handle and cheap. The stability of flow rate is the important element in this assembly-device and to achieve that condition we could be used flow meter. The basic principle of taking air sample using this device is by collecting contaminated air sample to trapped-solution in the impinger-tube. Gas contaminant on the bubble-air will be react with the reagent in the trappedsolution. Furthermore, the trapped-solution with contaminant inside is analyzed with instrumental analyze method using spectrophotometer. The device is using three impingers to place NO 2, SO 2, and NH 3. Nitrogen dioxide is analyzed using Griezz Saltzman method, which the formed azo compound measured at � 525 nm. Sulphur dioxide is analyzed using Pararosanilline method, which the formed complex is measured at � 555 nm. Ammonia is analyzed using Nesller method, and its measured at � 400 nm. From the test of this device compared with Lamotte ® we acquired the difference concentration of pollutant-sample aren’t much different.