GIFSQ Tools · Module 19 — Nutrition, Labeling & Dietary Assessment · Tool 374 of 500
Check a gluten result against the 20 mg/kg gluten-free limit and keep a device-only log of batch readings.
Try sample values — fills the form with the worked example below.
Saved on this device only.
| Date | Gluten (mg/kg) | Limit | Result |
|---|---|---|---|
| No readings saved yet. | |||
–
Compliant
–
Margin to limit (%)
–
Result as × limit
Equation: Margin (%) = (limit − measured) ÷ limit × 100. Ratio = measured ÷ limit. Compliant when measured ≤ limit.
Method: Codex Standard for Foods for Special Dietary Use for Persons Intolerant to Gluten, CXS 118-1979 (20 mg/kg); EU Regulation (EC) No 828/2014; US FDA gluten-free labelling rule, 21 CFR 101.91; Health Canada gluten-free claims — all set the limit at 20 mg/kg (20 ppm). Testing is by ELISA (R5 antibody, AOAC 2012.01) in the laboratory.
Assumptions: the result is for the finished product as sold; the limit entered is the jurisdiction's limit (20 mg/kg by default).
Limitations: a single test does not prove a whole batch — sampling and the method's uncertainty matter; a result at the limit needs a retest decision, not an automatic pass.
Rounding: margin to 1 decimal place; ratio to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Method: Codex Standard for Foods for Special Dietary Use for Persons Intolerant to Gluten, CXS 118-1979 (20 mg/kg); EU Regulation (EC) No 828/2014; US FDA gluten-free labelling rule, 21 CFR 101.91; Health Canada gluten-free claims — all set the limit at 20 mg/kg (20 ppm). Testing is by ELISA (R5 antibody, AOAC 2012.01) in the laboratory.
Assumptions: the result is for the finished product as sold; the limit entered is the jurisdiction's limit (20 mg/kg by default).
Limitations: a single test does not prove a whole batch — sampling and the method's uncertainty matter; a result at the limit needs a retest decision, not an automatic pass.
Rounding: margin to 1 decimal place; ratio to 2 decimal places; intermediates unrounded.
This is a calculation aid, not a laboratory report — confirm against your accredited method before citing a value.
Worked example: Gluten 12 mg/kg against a 20 mg/kg limit: compliant, margin 40.0%, result 0.60 × the limit.
Enter values above to see results.
“Gluten-free” means under 20 mg/kg in the US, EU, Canada and Codex — the same number everywhere. Tool 374 of 500 — GIFSQ
