Finished Sorghum Malt QA and Lot Release
What this page releases a lot to is a controlled brewing trial — not routine use, and not sale.
Inspect, then test — they are different controls
Visible inspection is what you do with your eyes and nose on every lot: mold, spoilage, damage, foreign material, off odor. It catches gross problems immediately and cheaply.
Laboratory testing is what inspection cannot do. A lot can look and smell fine and still carry gluten cross-contact or mycotoxins.
Collapsing these into one "we check every lot" step is the mistake worth avoiding. Do both, and record them separately.
What to test
- Gluten, for gluten-free suitability
- The mycotoxins identified by your facility's hazard analysis — the analytes come from your hazard assessment for the grain, region, season, and intended use, not from a generic list
Use a documented representative sampling plan and methods suitable for the analyte and matrix. A non-representative sample is not evidence, however good the laboratory is.
Use periodic independent laboratory verification to check your own program and your suppliers' results.
Acceptance criteria
Analytes, methods, and acceptance criteria come from a documented, hazard-based program for the intended human-food use and applicable jurisdiction.
This page sets no numeric mycotoxin threshold. Do not borrow one from elsewhere either: FDA's deoxynivalenol advisory applies to finished wheat products for human consumption, and the accompanying levels apply to grains and grain by-products used for animal feed. That DON guidance does not establish a human-food advisory level for sorghum malt or brewing ingredients.
Your acceptance limits are a food-safety decision for your program and jurisdiction, made with qualified review.
Identity, samples, and traceability
- Batch identity — every result is journalled against a batch ID, or it is not evidence about that lot
- Retained samples — kept and linked to lot and shipment, so a later question can actually be answered
- Traceability — the chain from grain lot through malt lot to the trial result
Bard's program ran this as a paper rule, not a habit: every lot moved with its written analysis sheet, and a lot without its results attached did not move. The discipline is transferable even where the numbers are not — the record travels with the material, or the material waits.
Homogenization
Small malt batches vary, and cross-mixing accepted lots gives the brewer a more consistent ingredient. Two rules make that legitimate:
- Only component lots that each independently meet the same intended-use release criteria may be combined. Every component passes on its own merits, before mixing.
- Preserve component identities and quantities, and give the resulting lot its own record.
Blending is not corrective action. It may not dilute, conceal, or correct mold, mycotoxin, gluten or cross-contact, identity, custody, unapproved material, or any unresolved QA or safety deviation. Mixing a failing lot into passing lots does not produce a passing lot — it produces a larger problem with worse traceability.
Nonconforming lots
A lot that fails, or whose status is unresolved, goes to hold under your documented nonconformance procedure. Restriction to a narrower use happens only under a separately authorized disposition. Otherwise: reject.
If in doubt, toss it out. The cost of rejecting a questionable lot is known. The cost of releasing one is not.
Release
Move on when all documented finished-malt acceptance criteria are met → release the lot to a controlled brewing trial only.
Hold, restrict, or reject otherwise.
Safety release and performance evidence are not the same thing
The brewing trial tells you how the malt performs — conversion, runoff, fermentation, flavor. That is real evidence, and it is the right basis for deciding whether to scale.
A successful brewing trial cannot override unresolved food-safety, gluten-free, identity, traceability, custody, or regulatory failures. Good beer is not a safety result. If later review or testing reveals a safety, gluten-free, identity, custody, traceability, or regulatory failure, a promising trial does not cure it; the lot remains nonconforming.
The Documented Evidence
The release logic rests on two documented facts: grain hazards can be present without a reliable visual signal, and the quality of the laboratory result depends on representative sampling of a heterogeneous lot. The papers support those controls; they do not set GFB acceptance limits.
- Sorghum can carry multiple post-harvest fungal and mycotoxin hazards — field-to-storage samples found diverse fungi and multiple mycotoxins in sorghum grain: Tola et al. (2022).1
- Sampling is part of the measurement — mycotoxins can be heterogeneously distributed in grain lots, so representative sampling is a central source of analytical validity: Ciasca et al. (2022).2
- Malt quality is multidimensional — sorghum malting and brewing work evaluates extract, enzyme activity, wort composition, fermentation, and finished beer as related but distinct outcomes: Espinosa-Ramírez et al. (2020).3
GFB's release criteria remain hazard-, jurisdiction-, method-, and facility-specific. The evidence supports the architecture of inspect, sample, test, trace, decide, and then trial — never the substitution of a successful brew for a safety release.
Record
Full QA panel results by batch ID, inspection findings recorded separately from laboratory results, sensory notes, retained-sample links, component and homogenization records, the release decision, and its basis.
Next step
On release, run the controlled brewing trial: screening via Malt Lab Mash Process for Testing, mash execution via The Reliable Mash: Enzyme Mash, and finished-beer validation under your facility's controlled pilot or production-validation procedure.
A test mash screens conversion and wort behavior — it does not establish finished-beer quality or replace production validation, and Gluten Free Brewer does not currently publish a page owning that final validation step.
For where release sits in the whole process, see the Sorghum Malting Process Overview.