Abstract:According to JJF 1059—2012 Evaluation and Expression of Uncertainty in Measurement and GB/T 15555.12-1995 Solid waste-Glass electrode test-Method of corrosivity,we determinated the pH value of slurry solid waste, established a ma-thematical model of uncertainty,analyzed the sources of uncertainty,quantified the uncertainty components,assessed the combined standard uncertainty,as well as the glass electrode method for the determination of the pH value of uncertainty in slurry solid waste.The testing results of uncertainty were as follows:pH=9.41±0.067,P=95%.