Evaluation of Uncertainty of Measurement of the Lead Content in Water Samples by FAAS

Both Laboratory Accreditation and Qualification Authentication require testing laboratories have the ability to evaluate the measurement uncertainty.According to 《Evaluation and Expression of Uncertainty in Measurement》(JJF1059-1999) to evaluate the uncertainty of measurement of the lead content in water samples by FAAS.Analyzing the sources of uncertainty in the entire course of the determination and calculating each component of uncertainty,the combined uncertainty and expanded uncertainty were obtained,and the mathematical expression of the determination result the lead content was also given.