The parameters of eqn (1), am, for ATPs containing the{ChCl (c) : sugars (su) + K3PO4 (s) + water (w)} system.
| Material | Constant | Value | C range (w/w) | R 2 a |
|---|---|---|---|---|
| ChCl | a c | 0.1452 | 0–0.08 | 0.9975 |
| K3PO4 | a s | 0.1308 | 0–0.10 | 0.9992 |
| Fructose | a su | 0.1473 | 0–1.20 | 0.9973 |
| Glucose | a su | 0.1474 | 0–1.20 | 0.9978 |
a
For the mass fraction range (C range) of each material, R2 denotes the corresponding correlation coefficient value of the linear calibration plot of the refractive index against the mass fraction of ChCl, salt, and sugars.