Experiment to show the starch content of a leaf. A fresh leaf (at left) is boiled in water for 30 seconds then in boiling ethanol for a few minutes. T

---

Experiment to show the starch content of a leaf. A fresh leaf (at left) is boiled in water for 30 seconds then in boiling ethanol for a few minutes. This removes most of the colour (centre). Iodine solution is added from a pipette. Those parts of the leaf containing starch turn blue-black (starch iodide, right).

---

Size: 4488px × 4488px
Photo credit: © Science Photo Library / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, analysis, background, biological, biology, botanical, botany, chemical, chemistry, content, cut, cut-, cutout, demonstration, distribution, education, experiment, group, iodide, iodine, laboratory, leaf, leaves, reaction, school, science, sequence, solution, starch, test, trio, white