The amine leakage is one of the important reasons for the internal leakage of heat exchangers.In addition to taking pre-measures,the detection of ammonia nitrogen at the inlet of heat exchanger be-comes important.Considering the leakage monitoring of amine materials,having the improved salicylic acid spectrophotometry based to develop an ammonia-nitrogen monitoring system was implemented.The test re-sults show that,the detection range of the detection system stays at 0 to 10 mg/L,the linearity is 0.999 0,and the color development time is 5 min.The RSD of repeatable experimental analysis is 1.97384％and the detection accuracy is controlled within±2％.
维普
万方数据