Procedure
I
II
Taken µg mL−1 Recovery*% RSD, %

 RE, % Taken µg mL−1 Recovery*, % RSD, % >RE, %
MO 6.0 99.84 1.03 -0.35 6.0 101.04 1.17 0.45
  8.0 99.56 1.33 -0.55 8.0 99.24 1. 44 -0.51
  10.0 100.30 0.63 0.66 10.0 99.78 1. 13 0.31
                 
BCG 6.0 99.46 1. 18 0.34 6.0 99.36 1.08 0.54
  8.0 99.88 0. 74 -0.40 8.0 99.70 1.10 -0.40
  10.0 99.68 0.106 -0.67 10.0 99.37 1.06 -0.66
                 
TCNE 5.0 100.25 0.93 0.27 7.0 99.50 0.82 0.51
  10.0 99.80 0.78 -0.32 14.0 99.34 1.14 0.46
  15.0 99.67 1.13 0.41 21.0 100.25 1.05 - 0.37
                 
TCNQ 7.5 99.34> 0.78 0.39 68.0 99.50 0.75 - 0.45
  15 99.67 1.09 - 0.32 16.0 99.34 0.95 0.37
  22.5 100.25 1.17 0.56 24.0 100.67 1.12 0.61
* Average of six determinations
Table 2: Evaluation of accuracy and precision for the proposed methods.
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