How to Measure Starch Damage

The SDmatic from KPM Analytics’ Chopin product line is ideal for measuring starch damage. Before running the unit, it must be turned on using the power button located on the rear of the device, next to the power cable.

All the items required to run a test are supplied with the unit, including the rinsing bowl, reaction bowl, sodium thiosulfate dropper, flour spoon and distilled water sprayer.

Preparing for Testing

Two chemicals - 1.5 g of citric acid and 3 g of potassium iodide - are required to create the solution for the SDmatic, as well as 1 g of flour and 120 ml of distilled water.

The solution is prepared by taking the 120 ml of distilled water and pouring this into the reaction glass. Next, the 1.5 g of citric acid is poured into the reaction glass, followed by 3 g of potassium iodide. One drop of sodium sulfate should then be added to the reaction bowl.

Initiating Testing

To commence testing, the user is required to weigh out 1 g of flour onto the flour spoon and place the reaction bowl with the chemicals underneath the device. The flour spoon is inserted directly under the screen into the metal slot.

The flour’s weight should be entered – for example, 1 g of flour plus or minus 0.01 g. The user can also enter a hydration basis and the protein value of the flour. Once all that information is entered, the ‘Test’ button is pressed and the device starts.

Once started, the device will heat to 35 °C before the countdown starts. After it has reached this temperature, the device will walk through all six steps of measuring the starch damage throughout the flour.

Finalizing the Test

When the test has stopped, the user can remove the reaction bowl, remove the side panel to enable cleaning and then use distilled water to spray the probes, removing any remaining sodium thiosulfate.

A paper towel can be used to wipe down the back plastic, if necessary, but it is important to avoid contact with the glass probe or heating element because these may still be hot.

After the cleaning procedure is complete, it is time to replace the reaction bowl filled with distilled water underneath and close the unit. This is the resting place for the bowl and is how the unit should be stored after tests are completed.

How to Measure Starch Damage using the CHOPIN SDmatic

This information has been sourced, reviewed and adapted from materials provided by KPM Analytics.

For more information on this source, please visit KPM Analytics.


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