Research Article

Spectrophotometric Determination of N-Acetyl-L-Cysteine and N-(2-Mercaptopropionyl)-Glycine in Pharmaceutical Preparations

Figure 3

Effect of the TPTZ concentration on the absorbance at 593 nm for the fixed concentration of 40 μM of the thiol (RSH) compound, that is, NAC or MPG, at pH 3.6 and 25°C. The concentration of Fe(III) was 0.2 mM.
140756.fig.003