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Our approach

Understand the details.

Five details to review before a material becomes part of your work.

Material identifiers

Start with the right material.

Compare the material name and identifiers with the label and the original report. A similar name is not a substitute for a matching identity.

Review: product name, identifiers, and the reported identity method.

An educational framework, not a statement of completed Wyz Labs testing.

Explore batch documentation
WYZ LABS / RESEARCH SERIESDetails, first.

What belongs in the record?

A guide to reviewing documentation; no batch results are asserted.
FieldWhat to reviewWyz Labs status
Material identityName, identifiers, and report matchFinal documentation pending
Quantity and formatUnits, composition, and physical formFinal documentation pending
Test resultsMethod, result, units, and scopeFinal documentation pending
TraceabilityLot, laboratory, report ID, and dateFinal documentation pending
Reading the methods

Different tests. Different questions.

Identity, purity, quantity and microbiological results describe different properties. These notes explain how to read analytical evidence; they do not state that WYZ Labs has performed these tests.

Chromatographic purity

Read the separation, detector and calculation behind the percentage.

Liquid chromatography separates sample components using a liquid mobile phase. In HPLC, a detector records the separated signals. When purity is reported as peak-area percentage, the result reflects the peaks included in that method and calculation.

What it does not establish

Detector response, overlapping signals and reporting thresholds affect interpretation. A peak-area percentage is not a measurement of milligrams per vial, sterility or endotoxin. A retention-time match alone is not sufficient identity evidence.

Fields to review

  • Method and detector
  • Reported purity basis and units
  • Chromatogram and integration scope
  • Specified impurities and reporting limits

Sources: IUPAC Gold Book: Liquid chromatography · FDA / ICH: ICH Q2(R2): Validation of Analytical Procedures · FDA / ICH: ICH Q6A: Specifications—Test Procedures and Acceptance Criteria

Mass-spectrometric identity

Compare the measured signal with the exact proposed material.

Mass spectrometry records ions by their mass-to-charge ratio. Coupled with liquid chromatography, it can add identity evidence to a separated sample signal. Read the reported assignment against the expected material and the method's acceptance criteria.

What it does not establish

Identity depends on the method's ability to distinguish plausible alternatives. A matching mass signal is not, by itself, a measurement of content or proof of every structural feature. Resolve ambiguous supplied forms rather than filling gaps from a similar name.

Fields to review

  • Expected material and supplied form
  • Observed mass-to-charge or assigned mass
  • Reference and acceptance criteria
  • Additional identity evidence where required

Sources: IUPAC Gold Book: Mass spectrum · FDA / ICH: ICH Q6A: Specifications—Test Procedures and Acceptance Criteria · FDA / ICH: ICH Q2(R2): Validation of Analytical Procedures

Measured content

Separate the amount determined by an assay from the catalog amount.

A quantitative assay estimates the amount of a specified substance in the tested sample. It needs a suitable calibration or reference and demonstrated accuracy and precision. Read the units and reporting basis, such as amount per vial or concentration.

What it does not establish

Label quantity and total powder mass do not replace an assay for the named compound. Purity percentage is a different measurement. For blends, review component-specific results and do not assign a single aggregate result to every ingredient.

Fields to review

  • Analyte and sample identity
  • Reference or calibration basis
  • Result and units
  • Per-component values for blends

Sources: FDA / ICH: ICH Q2(R2): Validation of Analytical Procedures · FDA / ICH: ICH Q6A: Specifications—Test Procedures and Acceptance Criteria

Sterility testing

Understand the sampled material and the conditions of the test.

Culture-based sterility tests look for microbial growth in the tested sample under defined conditions. Methods such as membrane filtration or direct inoculation require suitable recovery conditions, including checks that the material does not prevent the test from detecting growth.

What it does not establish

A negative result does not establish that every unit in a batch is sterile. This test also does not answer the separate endotoxin question. Look for the actual method and result; a general quality statement is not a sterility report.

Fields to review

  • Exact sampled lot
  • Test method and suitability
  • Sample scope and controls
  • Reported result

Sources: USP: USP <71> Sterility Tests: public harmonization text · USP: USP <1227> Validation of Microbial Recovery from Pharmacopeial Articles · USP: USP <797> Frequently Asked Questions · FDA: Bacterial Endotoxins/Pyrogens

Bacterial endotoxin testing

Read the assay, units and applicable limit together.

Bacterial endotoxin assays assess endotoxin associated with Gram-negative bacteria. Methods may use LAL or recombinant reagents. A report should identify the method, result, units and stated limit, with evidence that the sample matrix does not interfere with the measurement.

What it does not establish

Endotoxin testing is not a sterility test and does not detect every type of pyrogen. A pass applies to the stated assay and criterion. It is not a universal suitability claim, and no clinical-use conclusion follows from it.

Fields to review

  • Assay and reagent type
  • Numeric result or detection statement
  • Units and stated acceptance limit
  • Matrix-interference assessment

Sources: FDA: Pyrogen and Endotoxins Testing—Questions and Answers, Edition 2 · FDA: Bacterial Endotoxins/Pyrogens · FDA: FDA Clarifies Current Thinking on Pyrogen and Endotoxins Testing

Method applicability and lot results must come from the original product documentation. The official references explain analytical principles; they are not WYZ certifications or operating policies.

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