Sorghum Malt Evaluation Methods: A Field Survey
No lab ever sat down to design an evaluation method for sorghum malt as a character ingredient in an external-enzyme process. Instead, the field assembled a patchwork: South Africa's opaque-beer standard, the foundational CSIR assays it codified, barley institute methods applied off-label, academic lab conventions, and commercial certificate-of-analysis practice. Each has real strengths inside its original context. None was built for ours — which is why the informal fallback, for years, was ask Bard's.
The methodologies
| Methodology | Built for | The short verdict |
|---|---|---|
| SABS / SANS 235 | South Africa's opaque-beer industry | Correct at home; the field's stopgap everywhere else |
| Novellie / CSIR assays | Putting kaffircorn malting on a lab footing (1950s–60s) | The foundation everything else stands on — enzyme-first by premise |
| Barley-adapted methods | Barley malt, applied to sorghum with adjustments | Comparable numbers, wrong premise — the congress mash measures sorghum's deficit |
| IoB and EBC methods | European institute barley analysis | Same lineage, plus a unit-fragmentation problem the literature documents |
| Taylor / Pretoria conventions | Academic sorghum research | The research workhorse — rigorous, and enzyme-oriented by research question |
| Commercial COA practice | Whatever panel the lab already runs | Available and honest, but measures barley premises or feed nutrition |
What the patchwork tells you
Three patterns run through every page above. First, every method descends from an enzyme-first question — how much conversion power does this malt carry? — because every originating context (opaque beer, barley brewing, cereal-chemistry research) needed exactly that. Second, units fragmented because methods were borrowed rather than shared: SDU, °Lintner, °WK, and ASBC numbers coexist without clean conversion. Third, nobody measured the drinkability set — wort clarity, flavor contribution, FAN as a nutrition planning number — as first-class outputs, even though those decide whether a modern sorghum beer succeeds.
That three-part gap is what the proposed Sorghum Malt Evaluation Standard (GFB-SME) exists to fill.
For the decision view — every method side by side with pros, cons, and our proposal under the same scrutiny — see Methods Compared.
Related
- Proposed: Sorghum Malt Evaluation Standard
- Data Catalog — the datasets these methods produced