Potato Glucose Sugar Content Test Strips

SKU: 33814-GluP

$25.95USD or lower Each

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Measure reducing sugar levels in potatoes and other foods to study Maillard reactions and browning with Indigo® potato glucose test papers. They are ideal for food chemistry, nutrition, and culinary science labs.

Indigo® potato glucose test paper provides a simple, visual way to measure reducing sugar concentrations, primarily glucose, in potatoes and other starchy foods. The paper’s reagent changes color based on glucose levels, allowing rapid assessment of how storage conditions, temperature, and variety affect browning reactions during cooking or frying. It’s widely used in food chemistry, nutrition, and culinary science classes to demonstrate the chemistry behind color and flavor changes.

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The Science Behind Browning

When potatoes are fried, reducing sugars such as glucose and fructose react with amino acids to form melanoidins, the brown pigments responsible for flavor and color. This non-enzymatic browning, known as the Maillard reaction, also occurs in baking, roasting, and coffee roasting. Monitoring glucose levels helps predict and control these reactions for better texture, taste, and appearance.

Best Practices

Select 5 or more potatoes from the lot of potatoes you want to determine the sugar content.
Cut each the potato in half lengthwise to ready them for testing.
Take one test strip from the vial. Handle only the strip end needed to remove from the vial.
Apply the strip along the length of the cut potato and press the two halves together so all parts of the strip are moistened with potato juice.
Immediately remove the strip from the potato. Wait one minute.
If the strip stays yellow, there is no free glucose sugar and chips will fry a light color.
If the ribbon turns green, compare it with the color chart.
Any strip darker than the 1/10% color (1st green shade) will probably fry to a dark color.
Wipe knife blade before cutting next potato.

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Specifications

The number of strips (50) per bag is approximate.
Strips can be cut in half, thirds or even quarters for more tests!
Shelf life is 3 years but if bag is properly sealed, they should be good for a minimum of 5 years.
Strips will degrade if exposed to sunlight and come in a dark bag to prevent this.
Do NOT transfer strips to a clear bag or strips will degrade quickly.