Table 3 Comparison of the means of each of the three newly developed methods with the mean obtained by UV/Vis spectrophotometer using t test at 95% confidence level
Methods | Mean ± SD (%) | Degree of freedom | tcalculated | tcritical | Remark |
|---|---|---|---|---|---|
FT-IR-ATR | 1.52 ± 0.093 | 4 | 2.05 | 2.132 | No significantly different |
NIR | 1.50 ± 0.14 | 4 | 1.26 | 2.132 | No significantly different |
Fluorescence | 1.50 ± 0.05 | 4 | 1.97 | 2.132 | No significantly different |