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Table 4 Uncertainty due to dilution from 1.0mg/litre (1000 μg/L) to working range in 50 ml volumetric flask

From: Quantifying uncertainty in the measurement of arsenic in suspended particulate matter by Atomic Absorption Spectrometry with hydride generator

Uncertainty components Distribution Calibration uncertainty reported in certificate Standard uncertainty
Calibration accuracy as per certificate; k = 2 Normal ± 0.02 mL 0.02//2 = 0.01
Effect of temperature Variation on 50 mL volumetric flask Rectangular 50 × *3 × 2.1 × 10-4
= 0.032
0.032/√3 = 0.018
  1. In principal the uncertainty in measurement in the solution will be different from the uncertainty associated with the first dilution. However for simplicity we have considered the uncertainty of first dilution even after performing the dilution two times.