Professional Detailing2 min read

Below Detection Limit Does Not Mean a Coating Contains None

An analytical result reported below a detection limit does not establish absolute absence. Preserve the method limit and reporting language when summarizing a coating or ingredient analysis.

Updated · NANOLAB Knowledge

The key distinction

Every measurement has a scope. The relevant question is whether the method and its sensitivity are suitable for the claim being considered. A laboratory may report a result in a defined way that should not be simplified into zero merely because a spreadsheet expects a number.

Practical checks

  1. Ask the laboratory to explain the reported limit and units.
  2. Retain qualified results as qualified results in the data record.
  3. Check whether the method can support the intended composition or absence claim.

Example

Illustrative example: a report states that a target substance was not detected under the method conditions. A product page changes that wording to contains none. The second statement is broader and may not be supported by the analysis. A faithful summary keeps the analytical scope visible.

Scope and limits

Do not infer that every unmeasured substance is absent or that one sample proves every batch identical. This guide does not define a regulatory threshold or certify a product claim. Technical and, where relevant, regulatory review should match the wording to the actual evidence.

Related guidance

Ask NANOLAB about the exact product and intended use. Use the current product documentation for formulation-specific instructions.