ANALYTICAL SERVICES / CONTENT
Quantitative content.
A separate analytical question.
A claim such as “milligrams per vial” needs an appropriate quantitative method. A vial’s gross powder weight or a normalized chromatographic area percentage does not establish analyte content.
FEASIBILITY FIRST
A quantitative project needs support.
Start with the analyte and reference.
Quantitative feasibility depends on a clearly identified analyte, a suitable qualified reference material, its assigned value and the method used. Sample preparation, recovery, calibration, controls and the calculation basis all affect what can be reported.
- Confirm the exact material and the quantity to be measured.
- Review reference identity, assigned content and supporting documentation.
- Define the preparation, recovery and calibration approach.
- Demonstrate appropriate performance for the proposed claim.
- Agree on units, corrections, uncertainty treatment where applicable, and report limitations.
IMPORTANT DISTINCTION
Powder weight is not analyte content.
Keep the measurement specific.
A balance measures the mass placed on it. Research powders may also include water, counterions, residual solvents or other components. The total weighed powder therefore does not, by itself, tell you the mass of the named compound.
A supplier’s batch statement can inform a project inquiry. It is not automatically a qualified quantitative reference standard.
PROJECT AVAILABILITY
Confirm capability for your material.
No universal mg-per-vial promise.
Content determination is considered on an analyte-specific basis. Contact the laboratory to discuss whether the required reference, method and performance evidence are available. A quantitative result is not offered until its scope can be supported.
START A CONVERSATION
Let’s define your next analysis.
Start with your material, your research objective and the question you need the data to answer.