Starch in Food
Many starchy foods and often starch is usually interpreted to count the carbohydrates present in them. But … you can measure the amount of starch in foods? How do you do?
Because your body is unable to absorb the fiber so easily, some people like to subtract the fiber grams carbohydrates, for a net amount of carbohydrate grams.
In most countries, by law, all processed and packaged foods sold must clearly show grammes or the contribution of carbohydrate and fiber on the label, plus of course the nutritional information. If we speak instead of unprocessed foods like fruits and vegetables (which is very good and healthy), to inform the same aspect can consult records or library materials to find the figures in each case.
But in the attempt to answer the specific question, say you can not accurately measure the starch something at home, but it is perfectly possible to determine if a food has more or less concentration to another.
It takes a bit of liquid potassium iodide, and what you can to put one drop on the food and see the color change. The darker (purple) color (for example in the case of potato), starch will be more. Instead, a lighter tone reveals less quantity or concentration of starch in it.