How to Test Yogurt for Starch With Iodine

A complex interconnected series of sugar molecules (saccharides)
comprise starch molecules. To test for the presence of these
polysaccharides (many sugar) structured starches you will need iodine.
Often used as a science experiment, the iodine acts as an indicator,
changing color when it combines with starches. Use this technique for
yogurt, or any other substance in which you wish to find starches. A
color change occurs from the complex network of starches trapping the
iodine molecules, revealing a blue-black color. The iodine will not
change color in reaction to simple sugars, such as sucrose or
fructose, because these do not retain iodine between the sugar
molecules the way starches do.Di
The most common allergic reaction associated with iodine is actually
caused by muscle protein in shellfish. An allergic reaction to
shellfish can be serious, but a fairly simple test administered by a
medical professional can diagnose this allergy and help you avoid
exposure. Here's what to do if you feel you need to be tested for an
allergy to shellfish.Difficulty:ModerateInstructions Follow
whatever procedure is required by your health insurance provider for
referral to an allergen specialist.
Contact the allergist and ask
what process he uses to test for shellfish allergies.
Testing for
an allergy to shellfish can take one of three forms: scratch,
intradermal, or patch. It's best
Yogurt chips, while they might sound healthy, aren't. They're loaded
with high-fructose corn syrup and often have added chocolate. However,
they are a fun alternative to the everyday snack. Potato starch, on
the other hand, is a staple in the gluten-free community, used to
thicken sauces, replace flour in gluten-free recipes, and to moisten
baked goods. Yogurt chips and potato starch are uniting in this
gluten-free topping recipe. This topping can be used to give crunch
and texture to ice cream or yogurt, or to adorn the top of a cake or
pie.Difficulty:ModerateInstructions Things You'll Need
Wooden spoon
1 stick whipped butter
3/4 cup brown
1 1/2 teaspo
Food & Drink
Starch is a carbohydrate that is comprised of a large number of
glucose units. Starch can be a dietary concern for diabetics or those
watching their weight as it can be easily digested and then, raise
blood sugar levels quickly. To test for the presence of starch in
yogurt, you will need to use iodine. The colored chemical reaction in
response to the iodine mixture can indicate any starches
present.Difficulty:ModerateInstructions Things You'll
Yogurt Sample
Test Tube
Clean Spoon
Iodine Indicator

Pick a spoonful of
yogurt and drop it into the test tube.
Place two drops of iodine
into the yogurt with the eye dropper and blend well u

Hobbies, Games & Toys
Fingerprints help solve crimes and missing persons cases every day.
Some of these cases may be years old, but modern technology allows
investigators to lift and fix even old prints using iodine and starch.
The iodine sticks to the latent oils from the print and the starch
mixes with the iodine and makes a lightly sticky paste that quickly
hardens into a permanent stamp. You may fix fingerprints for fun at
home or in the classroom using methods similar to those used in the
field.Difficulty:ModerateInstructions Things You'll Need
Glass test tube
Test tube holder
Test tube
Iodine crystal
Paper strip
Warm water
Hobbies, Games & Toys
When testing your soil for iodine, the same procedure is followed as
for any other soil test. The sample must be taken from a wide range of
areas, and you must maintain the integrity of the sample by using
properly cleaned, un-galvanized stainless steel tools and clean
buckets for mixing. Iodine is naturally occurring in the soil,
especially in coastal and rocky areas. It is largely beneficial, as
our bodies need a certain amount in order for proper thyroid function.
We get our iodine mostly from the food we eat, such as seafood,
vegetables and salt with iodine artificially
added.Difficulty:EasyInstructions Things You'll Need
Spade or
soil probe
5-gallon bucket
Sampling kit
Home & Garden
The iodine value is a measure of the unsaturation of fatty acids and
is expressed in terms of the number of centigrams of iodine absorbed
per gram of sample (percent iodine absorbed). Iodine number test is
applicable to all normal fatter acids. Stearic acid belongs to this
class of fatty acids. Read on to learn how to test for iodine in
stearic acid.Difficulty:Moderately EasyInstructions Things You'll
Stearic acid
Carbon tetrachloride
Wijs solution />1 Erlenmeyer flask, 500ml
1 Glass stoppered volumetric flask,
1000 ml.
Pipettes with a capacity range of 5, 20 and 25 ml. />Oven
Hot plate
A.C.S grade glacial acetic acid
In 1829, French physician Jean Guillaume Auguste Lugol created a
solution of potassium iodide and elemental iodine in distilled water.
Called Lugol's iodine, the solution has been used as a disinfectant,
antiseptic and to disinfect drinking water during an emergency. />Over time, it has been discovered that Lugol's iodine is useful for
testing a number of things. From testing for starch, to testing for
vaginal cancer cells, to testing for thyroid function, Lugol's iodine
has been both diagnostic and preventative. Testing for
StarchFruits, vegetables and other organic compounds that contain
starch carbohydrates can be identified with the application of Lugol's

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