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Table 6 Results obtained in accuracy assessment by recovery experiments

From: Application of two charge transfer complex formation reactions for selective determination of metformin hydrochloride in pharmaceuticals and urine

Product analyzed PCA method DDQ method
MEB in tablet, μg mL-1 Pure MEB added, μg mL-1 Total found, μg mL-1 Pure MEB recovered (percent ± SDa) MEB in tablet, μg mL-1 Pure MEB added, μg mL-1 Total found, μg mL-1 Pure MEB recovered (percent ± SDa)
X 100.20 50.00 153.65 102.3 ± 1.09 19.99 10.00 30.80 102.7 ± 1.32
100.20 100.00 202.00 100.9 ± 1.79 19.99 20.00 39.49 98.76 ± 0.45
100.20 150.00 260.71 104.2 ± 1.22 19.99 30.00 48.73 97.48 ± 1.35
Y 99.51 50.00 152.35 101.9 ± 1.34 20.06 10.00 29.06 96.67 ± 2.10
99.51 100.00 194.48 97.48 ± 1.64 20.06 20.00 40.94 102.2 ± 1.25
99.51 150.00 245.44 98.37 ± 1.21 20.06 30.00 49.22 98.33 ± 1.23
  1. aAverage of three measurements