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Development and Validation of Spectrophotometric Method for Determination of Penicillamine (PA) in Pharmaceutical Formulation Using 4-Choro-Nitrobenzo-2-Oxa-1, 3-Diazol (NBD-CL)

Abdalla Ahmed Elbashir, Amira Anwar Babikir Alfadil

World Journal of Analytical Chemistry. 2013, 1(2), 18-22 doi:10.12691/wjac-1-2-1
  • Figure 1. Absorption spectrum of D-PA (a), NBD-CL and reaction product of D-PA with NBD-CL (c) against blank. Conditions: D-PA (15µg ml-1), NBD-CL (0.3 %, w/v) and pH 10.5
  • Figure 2. Effect of pH on the reaction of D-PA with NBD-CL. D-PA (15 µg/ml): 1mL; buffer ; 1.0ml; temperature 25ºC; reaction time: 25min
  • Figure 3. Effect of NBD-CL concentration on the reaction of D-PA with NBD-CL. D-PA (15 µg/ml): 1ml; buffer solution (pH 10.5); 1.0ml; temperature 25ºC; reaction time: 25min
  • Figure 4. Effect of the volume of the buffer on the reaction of D-PA with NBD-CL. D-PA (15 µg/ml): 1mL; buffer solution (pH 10.5); temperature 25ºC; reaction time: 25min
  • Figure 5. The continuous variation plot for the stoichiometry of the reaction of D-PA with NBD-CL
  • Scheme 1. Reaction pathway of D-PA with NBD-Cl