Research Article
A New Approach for the Determination of Benzocaine and Procaine in Pharmaceuticals by Single-Sweep Polarography
Table 4
Characteristics of quantitative polarographic determination of BC and PC, pH 4.0.
= 1·10
−3 mol·L
−1 =0.5 Vs
−1.
| | Analytical parameter | BC | PC |
| | Peak potential, V | -0.24 | -0.51 | | Linear concentration range, mol·L−1 | 1·10−6 - 5·10−5 | 1·10−6 - 5·10−5 | | Slope (μA·L/ mol) | 4.1·104 | 9.1·104 | | Intercept (μA) | 1.7·10−2 | 4.2·10−2 | | Correlation coefficient, R | 0.9996 | 0.9996 | | RSD (%) | 2.12 | 1.13 | | Limit of quantitation (LOQ), mol·L−1 | 1.8·10−6 | 1.9·10−6 | | Limit of detection (LOD), mol·L−1 | 5.6·10−6 | 6·10−6 |
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