Methods Added (μg mL-1)                                    Intra-day                                  Inter-day Recovery % Precision RSD % a Accuracy RE % Confidence Limitb Recovery % Precision RSD % a Accuracy RE % Confidence Limitb p-CLA 20 99.40 0.47 -0.60 19.88 ± 0.089 99.70 0.76 -0.30 19.94 ± 0.144 60 99.20 0.78 -0.80 59.52 ± 0.44 100.60 0.48 0.60 60.36 ± 0.276 100 99.70 0.59 -0.30 99.70 ± 0.56 99.50 0.51 -0.50 99.50 ± 0.483 120 100.50 0.92 0.50 120.6 ± 1.06 99.30 0.88 -0.70 119.16 ± 0.999 TCNQ 5.0 99.35 0.64 -0.65 4.968 ± 0.012 99.80 0.54 -0.20 4.99 ± 0.026 10 100.30 0.86 0.25 10.03 ± 0.082 99.45 0.70 -0.55 9.945 ± 0.066 15 99.90 1.07 -0.10 14.985 ± 0.15 100.35 0.96 0.35 15.05 ± 0.138 25 99.55 0.57 -0.45 24.89 ± 0.135 100.10 1.03 0.10 25.03 ± 0.246 Quiz 4.0 99.50 0.68 -0.50 3.98 ± 0.028 99.90 0.90 -0.10 3.996 ± 0.0377 8.0 99.80 1.04 -0.20 7.984 ± 0.087 99.30 0.55 -0.70 7.944 ± 0.046 12 99.20 0.89 -0.80 11.904 ± 0.11 99.10 0.71 -0.90 11.892 ± 0.089 16 98.80 1.12 -1.20 15.808 ± 0.186 99.00 1.16 -1.00 15.84 ± 0.193 ARS 2.0 99.90 0.53 -0.10 1.998 ± 0.011 99.20 0.61 -0.80 1.984 ± 0.013 4.0 99.30 1.20 -0.70 3.972 ± 0.05 99.70 1.03 -0.30 3.988 ± 0.043 6.0 99.10 0.76 -0.90 5.946 ± 0.047 99.10 0.87 -0.90 5.946 ± 0.054 8.0 98.95 1.46 -1.05 7.916 ± 0.12 100.40 1.35 0.40 8.032 ± 0.114 aMean of six determination, RSD%, percentage relative standard deviation; R.E%, percentage relative error. bMean ± standard error.

Table 3: Evaluation of intra-day and inter-day precision and accuracy obtained by the proposed methods.

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