A table of decimals, abbreviations and a laboratory logo can look like a final answer. Yet an analysis describes something specific: a particular sample examined in a particular way. The useful work begins with the context around the number. A date or a unit may matter as much as the prominently displayed value.
Start with the sample
A report describes the sample examined by the laboratory. Identification and date therefore matter. A measurement cannot automatically represent another material or sample, however professional the report looks.
A percentage and a number of milligrams are different kinds of information. Units and calculation bases must match before results can be compared. Ask which substances were actually measured. Cannabinoid testing is not automatically a test for every other possible constituent.
A concrete example
Consider a calculation only: 10 milligrams per gram equals 1% by mass, because a gram contains 1,000 milligrams. But 10 milligrams per millilitre cannot automatically be compared with 1% by mass; the mass of the liquid is missing. Neither figure establishes an appropriate use. Start by finding the sample identifier, date, unit and measured substance. Then ask whether the report actually investigates the question you want answered.
Why use reference materials?
NIST develops control materials and comparison programmes that help laboratories evaluate their measurements, including cannabinoids and selected elements. Accurate measurement involves checks and documentation, not simply an instrument displaying many decimal places.
Chemical analysis and clinical trials answer different questions.
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