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Table 4 Potentiometric determination of DL in pharmaceutical preparation using SPCEs

From: Disposable screen-printed sensors for determination of duloxetine hydrochloride

Standard addition -log conc. taken
(mol L-1)
Pure solution Cymbalta® tablets Reported method23
   Recovery
%
RSD*
%
Recovery
%
RSD*
%
Recovery
%
RSD*
%
  5.0 99.80 0.7 99.20 0.3   
  4.0 99.50 0.8 99.25 0.5 99.60 0.9
  3.0 100.00 0.6 99.33 0.4 99.75 0.7
  2.0 99.50 0.8 98.50 0.3 99.33 0.5
Titration 5.0 99.60 0.2 99.40 0.6 99.50 0.2
  4.0 99.25 0.5 99.00 0.9   
  3.0 99.33 0.1 99.67 0.3   
  2.0 99.00 0.6 99.00 0.8   
  1. *Average of five determinations