Comparative Performance of Megazyme & SDmatic on Durum Wheat Semolina Starch Damage Analysis

This application brief evaluates the two leading methods for measuring damaged starch—the enzymatic Megazyme method (AACC 76-31.01) and the amperometric SDmatic method (AACC 76-33.01)—when applied to durum wheat semolina. While both methods correlate well for white wheat flour, no comparative data existed for durum wheat semolina until now.

The results were clear.

• In repeatability testing, SDmatic delivered a coefficient of variation of just 0.06%, compared to 4.45% for Megazyme.
• The Megazyme method's reproducibility across two laboratories reached 10.1%, signaling poor consistency at the low starch damage levels typical of semolina.
• SDmatic also proved far better at distinguishing quality between suppliers: while Megazyme showed no measurable difference among five semolina producers, SDmatic clearly identified meaningful variation.

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