A clearer reading
Read spectrum claims carefully
Keep a vendor word separate from a sample measurement.
Library & source links
Review-only course draft. Fictional examples teach reading and arithmetic. Public content is unchanged.
Distinguish a spectrum claim from a numerical tested result.
In this lesson: concepts, example and checks
Vendor claim
Broad spectrum
Report observation
ND · limit stated
Unresolved link
Current shipping lot
Copy the claim without upgrading it
Treat a spectrum word as the vendor’s stated category. Check the report separately instead of turning the word into a numerical result.
Read the reporting context
NIST’s report defines ND as not detected in the sample extract and cautions against replacing nondetection with zero.
Carry the measurement fields
Keep the analyte name, lot, method, unit and stated limit beside the result. Do not let this reading exercise become a destination-eligibility judgment.
Fictional worked example
Fictional spectrum/report comparison
A fictional label says “broad spectrum.” A separate fictional report says “THC:ND; stated limit 0.1%” for sample FICT-A. No current shipping lot is supplied.
- Record “broad spectrum” as the label claim.
- Copy ND and the stated limit as reported for FICT-A.
- Leave the current shipping-lot association unresolved.
The spectrum word alone supplies neither a number nor the identity of the lot currently shipping.
Keep these actions
- Keep claim and measurement separate.
- A report’s stated limit stays beside ND.
- A spectrum word is not a worldwide eligibility decision.
Practice, then revise
Choose an answer and check the explanation. Incorrect answers remain revisable. A check attempt is not mastery or a credential.
Recognize the boundary
A fictional bottle says “broad spectrum” and supplies no test result. What is established by that wording?
Read the supported answer and reasoning
Only the vendor’s spectrum claim Correct: retain the claim at its stated scope.
Apply it to the example
The fictional report states “ND; limit 0.1%.” Which record preserves its scope?
Read the supported answer and reasoning
ND with its stated limit and sample identity Correct: retain the report’s fields and unresolved lot link.
This is your explicit reading mark. Attempting a check never marks the lesson reviewed automatically.
Sources and next steps
- NIST IR 8519: cannabinoid measurement report
Source checked 2026-10-26. Scoped abstract, Table 2-7 ND note and reporting-limit passage; not all 304 pages reviewed.
New editorial draft checked 2026-10-26; separate source/editorial review pending. AI authorship; no scientific/clinical credentials, expert endorsement or treatment advice claimed.
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