The SRC (Solvent Retention Capacity) method is a measure of hydration based on the increased swelling capacity of the flour’s different polymers when brought into contact with certain solvents – distilled water, 5% lactic acid (to measure the glutenins), 5% sodium carbonate (to measure the damaged starch) and 50% sucrose (to measure the pentosans).
These solvents are used to predict the functional contribution of each of the polymers to the quality of the flour (KWEON et al., 2011).
A fully automated and simple procedure
The SRC-CHOPIN is a completely automatic system, controlled by a touch screen. It combines a dedicated external scale, shaker, centrifuge, and a system for draining the supernatant.
- The tubes are weighed with a special scale that is equipped with a scanner, which saves time and avoids possible input errors.
- Syringes containing the solvent and tubes containing the flour are inserted into the machine according to the automatically predefined test scheme indicated on the screen.
- All the operator has to do then is start the test. The next steps (shaking, centrifuging, and draining) are performed automatically.
- After the final weighing, the results are instantly calculated and displayed.
SRC – Benefits
- Use a single test to analyze the flour main functional components that directly influence the quality of the final product: damaged starch (dough stickiness), glutenins (extensibility and elasticity) and pentosans (dough viscosity and final product volume)
- Understand rheological analyses better, optimize the final products quality (cookies, crackers, breads, etc.)
- Benefit from a method that is acknowledged all around the world and standardized (AACC 56-11)
- Use a test that is common in the whole cereal industry, from breeding to baking
SRC-CHOPIN – Advantages
Gain in productivity
- One machine allows for the analysis of up to 64 samples a day (example: 16 flours, 4 solvents – for an 8-hour day).
- The operator’s time is reduced (about 20 minutes to test 8 samples with the SRC-CHOPIN, compared to about 45 minutes for the manual method).
Improvement of precision
- Results are more accurate and reproducible.
- Results are comparable between laboratories. Operator error is no longer an issue.
Simplification of the process
- The different stages of the standard SRC test are automated.
- Calculations and results display are automated.