PARAMETER METHOD-A METHOD-B
    EPS HCZ EPS HCZ
1 Working λ 267.5 nm 271.5 nm 277 nm 271.5 nm
2 Beer’s law limit (μg/ml) 15-75 5-25 15-75 5-25
3 Correlation Coefficient (r2)* 0.9994 0.9996 0.9994 0.9996
4 Slope (m)* 0.0202 0.0704 0.0202 0.0704
5 Intercept (c)* 0.0424 -0.0084 0.0424 -0.0084

*Average of five determination
Table 1: Optical Characteristics and Linearity Data of EPS and HCZ.