CHEMOMETRICS ASSISTED UV-SPECTROPHOTOMETRIC ...

Compound λ*
(nm)
Table 1. Spectral and analytical parameters for both benzoic acid and salicylic acid as calculated from the 1 D
zero-crossing points against the given concentrations of standard compounds at the selected wavelengths:
LC R **
(µg/ml)
Benzoic acid 237.5 5-50
Salcylic acid 310.5 5-50
Slope (b)
+SE***
0.00058+0.00252
Intercept
(a) +SE
34
r * r 2 ** LOD†
(µg/ml
)
LOQ††
(µg/ml)
-0.00421+0.00008 0.9985 0.997 1.8 6.0
-0.00029+0.00045 -0.00107+0.00002 0.9993 0.999 1.3 4.2
* λ=wavelength of determination, ** LCR= linear calibration range, *** SE=standard error, * r=
correlation coefficient
** r 2 = determination coefficient,† LOD= limit of detection, †† LOQ= limit of quantification