Error Sources of Determination of Sulfur Dioxide in Atmosphere
ZHONG Min1, CAI Guo-Jun1, LIANG Run2
1. College of Environment & Civil Engineering, Chengdu University of Technology, Chengdu 610059, China; 2. Product Quality Supervision and Inspection Centre in Chengdu, Chengdu 610041, China
Abstract This article analyzed error sources such as the stability of instruments and standard solutions, pararosaniline solutions with different pH and the conditions of chromogenic reaction in the determination of sulfur dioxide in atmosphere by spectrophotometry using formaldehyde and pararosaniline hydrochloride, and provided corresponding solution methods. The combination of practical operation and theoretical analysis can guides students to solve actual problems by professional theories, which is beneficial to the education quality.
