Counterfeit detection pens use a starch-iodine reaction. We fool them using chemistry!

Why this iodine test can't be trusted Essentially, the iodine test is a starch detection test. "Amylose, a component of starch, reacts with iodine to produce a deep blue or blue-black colour.

Counterfeit detector pens use a starch-iodine reaction to identify fake bills. But could you fool them with chemistry? In today’s episode, we dive into the chemistry of iodine, its color and its clock ...

The reaction between iodate and bisulfite in acid medium produces iodine. Solutions A (iodate) and B (bisulfite) are mixed at room temperature in differing concentrations, producing a blue-black ...

A rare iodine polymer discovery is key to starch-iodine mystery.

And yet even though the potassium iodide and the starch are in the same initial solution, they’re clear. That’s because the iodine is in a form that doesn’t react with the starch yet.

This starch-iodine complex transformation discovered almost exactly 200 years ago, is used in classrooms as a foundational teaching tool in chemistry and biochemistry, such as demonstrating the ...

IntroductionI. The reaction between iodate and bisulfite in acid medium produces iodine. Solutions A (iodate) and B (bisulfite) are mixed at room temperature in differing concentrations, producing a ...

The starch solution was used in this activity because it forms a blue-purple–colored chemical when combined with iodine.

Basically, iodine substitutes for a hydrogen atom in the polyphenols. This means that the iodine is used up and there isn’t any left to complex with starch to produce the blue colour.

An unexpected finding: Rare iodine polymer discovery is key to starch-iodine mystery Date: August 18, 2016 Source: University of California - Santa Barbara Summary: In the pursuit of a new class ...