Outline5 marksStandard
The table below shows the colour results obtained when a glucose test strip is dipped into solutions containing different concentrations of glucose. The strip contains glucose oxidase, peroxidase, and a colourless chromogen.
| Glucose concentration (mmol dm⁻³) | Colour of test strip after reaction |
|---|---|
| 0 | No colour change (remains white) |
| 2 | Pale blue |
| 5 | Medium blue |
| 8 | Deep blue |
| 12 | Very dark blue |
Outline how the glucose test strip produces these colour changes, including the role of glucose oxidase.