Table 1. Comparison of Analytical Performance Parameters of the Developed and Reference (Alkaline CUPRAC) Methods for Glucose Standards.
| parameter | proposed method | reference method |
|---|---|---|
| linear rangea | 9.6 × 10–7 to 7.2 × 10–6 | 6.0 × 10–6 to 3.0 × 10–5 |
| LODb | 4.0 × 10–8 | 6.0 × 10–7 |
| LOQc | 1.3 × 10–7 | 6.0 × 10–6 |
| linear regression equationd | A = 1.5 × 105C – 0.0665 | A = 3.6 × 104C + 0.0063 |
| correlation coefficient (r) | 0.9999 | 0.9999 |
| RSD (%) (n = 7) | 0.9 | 0.6 |
a
In mol L–1 units at final concentrations (i.e., in the cuvette for spectrophotometric measurement).
b
Limit of detection in mol L–1 units at final concentrations (LOD = 3 σbl/m, σbl denoting the standard deviation of a blank and m showing the slope of the calibration line).
c
Limit of quantification in mol L–1 units at final concentrations (LOQ = 10 σbl/m, σbl denoting the standard deviation of a blank and m showing the slope of the calibration line).
d
A stands for absorbance, C molar concentration. All correlation coefficients (r) were found using absorbances which were repetitively measured three times (N = 3).