ResoluxLabsAnalytical testing

Analytical capabilities

Analytical testing
built around the sample.

Every method is published with the question it answers, the limits of that answer, the material required, the turnaround and the price. Nothing about scope is left implied.

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025050075010000123456789Retention time (min)Absorbance (mAU)4.42 min
Fig. 1 — Illustrative separation — principal peak with related substances. Axes and integration markers shown for illustration; not a customer result.

Primary service

Complete Peptide Analysis

$189

per sample

Purity, quantity and the full chromatogram for any peptide, on one certificate. One price for every compound we accept.

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  • HPLC-DAD Purity
  • Quantity / Assay
Standard turnaround
5 business days
Sealed sample vials in the autosampler tray of the HPLC-DAD system
Capped sample vials seated in the autosampler carousel

Methodology

The methods themselves

What each method establishes, and what it explicitly does not.

safety · Method in development

Bacterial Endotoxin Testing

$189

7 business day standard

Bacterial endotoxin testing by kinetic chromogenic Limulus amebocyte lysate (LAL) assay. Reported as endotoxin units per milligram of peptide, with the assay range and any interference or dilution factors stated on the certificate.

What this answers
How much bacterial endotoxin is present, in endotoxin units per milligram, measured by kinetic chromogenic LAL against a standard curve.
What it does not establish
  • Sterility — endotoxin is a pyrogen measurement, not a test for viable organisms
  • Any other microbiological contaminant, including bioburden, fungi or mycoplasma
  • Fitness for injection, human use or any particular application
Methodology
Kinetic chromogenic LAL, run with standard curve, positive product control and reagent blanks. Samples are screened for inhibition/enhancement and diluted to a non-interfering concentration where required.
Sample requirements
One sealed vial, original labelling intact. Endotoxin testing is destructive to the aliquot used and cannot be performed on an opened or previously reconstituted vial with any meaningful interpretation.
On your certificate
Endotoxin concentration in EU/mg · Assay range and dilution factor · Inhibition/enhancement (interference) check · Method and analyst attribution

Add-ons

Additional work on the same sample

Selected in the order builder and reported on the same certificate where the method allows.

Additional Vial, Same Lot
$59
Additional vial processed under the same-lot policy.

In development

Not offered yet

Published so the scope of the laboratory is clear. These cannot be ordered today.

  • LC/MS Confirmation

    Mass-spectrometric confirmation.

  • Residual Solvents

    Residual solvent screening.

  • Heavy Metals

    Elemental impurity screening.

Volume programmes

Repeat testing,
run as a programme.

Multi-sample submissions, lot-by-lot verification and recurring schedules are configured with the laboratory directly.

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