TCNQ                        p-CLA                        Quiz                        ARS
  Taken
(μg mL-1)		 Added
(μg mL-1)		 Recovery*
 (%)		 Taken
(μg mL-1)		 Added
(μg mL-1)		 Recovery*
 (%)		 Taken
(μg mL-1)		 Added
(μg mL-1)		 Recovery*
 (%)		 Taken
(μg mL-1)		 Added
(μg mL-1)		 Recovery*
 (%)
  4.0 - 99.10 20 - 99.80 4.0 - 99.10 2.0 - 100.30
    4.0 99.80   20 99.60   2.0 99.50   2.0 100.20
    8.0 99.45   40 99.40   4.0 99.80   3.0 98.50
    12 100.20   60 99.20   8.0 99.90   4.0 99.80
    16 99.70   80 99.75   12 100.50   5.0 100.40
    20 99.0   100 99.00   16 100.30   7.0 99.50
Mean ± SD     99.54 ± 0.452     99.46 ± 0.317     99.85 ± 0.513     99.87 ± 0.714
       V     0.204     0.10     0.263     0.51
   R.S.D%     0.454     0.319     0.514     0.716
      S.E     0.184     0.129     0.209     0.291
aAverage of six determinations.
Table 4: Application of the standard addition technique for the determination of ZMT in No-Migain tablets (2.5 mg ZMT/tab) using the proposed methods.
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