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Table 3 Uncertainty in repeatability of values obtained from AAS

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

Sample I.D. Concentration of arsenic in SPM samples in ng/m3 (x) Standard uncertainty u(x) Combined uncertainty due to [C As ] from section 5.0
S-1 5.58 ± 0.271*1 0.272
S-2 3.19 ± 0.182*1 0.183
S-3 4.34 ± 0.212*1 0.213
S-4 1.44 ± 0.112*1 0.113
S-5 1.69 ± 0.122*1 0.123
S-6 2.33 ± 0.131*1 0.132
S-7 1.42 ± 0.113*1 0.114
  1. *1 ± = uncertainty in repeatability in concentration measurement of arsenic