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Table 1 Performance data of the determination of MTP and FLD in pure form by the proposed method

From: Synchronous fluorescence spectrofluorimetric method for the simultaneous determination of metoprolol and felodipine in combined pharmaceutical preparation

Parameter Metoprolol Felodipine
Concentration range (μg/mL) 0.5-10.0 0.2-2.0
Correlation coefficient 0.9999 0.9999
Slope 56.36 164.51
Intercept 11.12 7.15
Limit of detection (LOD) (μg/mL) 0.11 0.02
Limit of Quantification (LOQ) (μg/mL) 0.32 0.06
Sy/x 2.87 1.31
Sa 1.82 0.91
Sb 0.33 0.91
%RSD 1.49 1.17
%Er 0.61 0.48
  1. Sy/x, Standard deviation of the residuals;
  2. Sa, Standard deviation of the intercept
  3. % RSD = Relative standard deviation;
  4. Sb, Standard deviation of the slope
  5. % Error = %RSD/√n.
  6. n = 6.