Environmental
Defend every initial calibration your lab reports.
VOCs, SVOCs, PFAS, pesticides, PCBs. Every result traces back to an ICAL. WLTR shows every candidate model side by side and objectively identifies the best fit, so you can stand behind the fit you report to clients, data validators, and your accreditation body.
Why labs switch to WLTR
Review a full 8260 or 8270 ICAL at once, not one compound at a time.
Chromatography data systems were built to acquire and process data, not to judge a calibration. WLTR does that job objectively, for every analyte, in one view.
- Your CDS shows one analyte at a time, on one small screen.
- Curves are checked by hand, analyte by analyte, often in a spreadsheet.
- The model is chosen by whoever processed the batch, often a junior analyst.
- QA directors sign off without an objective basis for the curve that was chosen.
- Every analyte and every candidate model on one screen, in the Calibration Intelligence dashboard, with multi-analyte visibility.
- Every curve is checked automatically, including accuracy at the reporting limit.
- The best fit is determined objectively: same data, same answer, every time.
- QA directors review exceptions only, with one unified calculation behind every calibration.
Hours back every batch
Review by exception instead of one analyte at a time.
Peace of mind for QA
An objective, documented basis for every curve that is signed off.
Accurate data for clients
Results built on the best-fit calibration, not on habit.
More capacity, more revenue
Faster review frees analysts and QA to take on more work.
What WLTR adds to your data
A passing ICAL is not the same as the right ICAL.
Methods such as SW-846 Method 8000D give analysts several calibration options, from average response factor to linear and quadratic regression. WLTR independently evaluates your calibration standards, ranks how well each established model fits, and documents the result for every analyte on every instrument.
The right fit, backed by evidence
WLTR evaluates the candidate calibration models side by side, so the option your lab reports for each analyte is supported by data rather than habit or software defaults.
Accuracy where decisions are made
WLTR checks every calibration level, including how accurately low standards recalculate. Bias near the LOQ and regulatory action levels surfaces before a result goes out to a client.
Every compound, every instrument
Long target lists like 8260 and 8270 mean a handful of analytes can drive most of your failures. See which compounds and instruments struggle, and trend them over time. Multi-analyte oversight
Data packages that stand up to review
A documented, reproducible calibration evaluation strengthens full data packages, third-party data validation, and on-site assessments. Audit defensibility
See it for yourself
Same ICAL. Three calibration options. Three different answers.
Switch the calibration model and watch how accurately each standard recalculates. The unweighted linear fit posts an r² above 0.998 and still misses badly at the low end, right where reporting limits live.
Inside WLTR
From ICAL export to a defensible record.
Step 01
Upload the ICAL straight from your data system.
Drop in the initial calibration export from your GC, GC-MS, or LC-MS/MS data system. WLTR parses the run and confirms instrument and method context. Nothing about how your instruments acquire or process data changes.
Step 02
Long target lists, mapped once.
8260 and 8270 compound names rarely match across instruments and software. WLTR maps every analyte to a consistent name so results can be trended across runs and instruments.
Step 03
Every compound, every model, side by side.
WLTR fits each analyte against the candidate calibration models and shows how accurately every standard recalculates, so curvature and low-end bias are visible at a glance.
Step 04
A ranked, documented recommendation.
All 15 acceptance criteria roll up into a ranked model comparison with a clear recommendation and the evidence behind it, ready for data review and your data package.
WLTR complements your accredited methods. It does not replace your CDS, your LIMS, or your method SOPs. The WLTR methodology is patented (US 12,038,448 B2).
Where calibration risk hides
The calibration problems environmental labs live with.
Average RF near its %RSD limit
An average response factor that barely passes can hide real curvature, especially for poor responders and active compounds.
Quadratic fits used to rescue a curve
Switching to a quadratic can make an ICAL pass while masking detector saturation or a failing standard.
Low standards that will not recalculate
When the lowest point fails to recalculate, the reporting limit, MDL support, and every result near it are in question.
Passing CCVs on a weak ICAL
Continuing calibration verification can pass at mid range while the low end of the initial calibration is biased.
Reruns and lost instrument time
Recurring ICAL failures on the same analytes cost recalibration, reanalysis, and missed holding times.
Qualified and rejected data
Calibration issues flagged in third-party data validation turn into qualifiers, rejected results, and difficult client conversations.
How it works
Three steps. No change to your methods.
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Export
Export initial calibration data from your chromatography data system.
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Evaluate
WLTR fits your standards against the candidate calibration models, scores each one, and ranks model performance for each analyte.
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Review and document
Analysts, data reviewers, and QA receive a clear verification result per analyte and instrument, ready for data review, data packages, and assessments.
Regulatory alignment
Built around the standards your lab is assessed against.
| Framework | What it covers | How WLTR supports it |
|---|---|---|
| TNI Standard EL-V1M4, Chemical Testing | Initial calibration and calibration verification requirements for accredited environmental laboratories. | Documented calibration evidence for internal audits and TNI, NELAP, and state assessments. |
| EPA SW-846 Method 8000D | Calibration options and criteria for chromatographic methods such as 8260D, 8270E, 8081B, and 8082A. | Side-by-side comparison of calibration models for every analyte in the ICAL. |
| 40 CFR Part 136, Clean Water Act methods | Approved wastewater test procedures and required quality control elements, including calibration. | Independent verification of initial calibrations used for NPDES compliance reporting. |
| Safe Drinking Water Act methods (40 CFR Part 141) | Approved drinking water methods, including EPA 524 series, 525, 533, and 537.1. | Calibration evidence for results reported against MCLs and health advisories. |
| DoD/DOE Quality Systems Manual | Additional calibration and QC requirements for laboratories serving federal programs. | Reproducible calibration evaluation that supports QSM data review. |
Who it is for
Built for the people who sign the report.
- Laboratory directors
- Technical directors
- QA officers and managers
- GC, GC-MS and LC-MS/MS analysts
- Data reviewers and validators
- Client project managers
Questions
Frequently asked questions
Does WLTR replace our CDS or LIMS?
No. Your chromatography data system keeps running as it does today, and your LIMS continues to manage samples, reporting, and data packages. WLTR is a verification layer that evaluates the initial calibration data your instruments already produce.
Will WLTR help with TNI and state accreditation assessments?
WLTR gives your lab a documented, reproducible evaluation of each initial calibration, including how the calibration option you report compares with alternatives and how accurately each standard recalculates. That record supports the calibration questions auditors and data validators ask.
Which methods and instruments does WLTR work with?
WLTR is built for methods that quantitate against an initial calibration, including GC-MS volatiles and semivolatiles, LC-MS/MS methods such as PFAS analysis, and GC-ECD and GC-FID methods for pesticides, PCBs and petroleum hydrocarbons.
Do we have to change our methods or SOPs?
WLTR works from calibration data you export after a run. It does not change how your instruments acquire or process data. How WLTR results are referenced in your SOPs is decided by your quality system.
How do we get started?
Apply to the WLTR Pilot Program or request a demo. We will review your workflow and show how WLTR evaluates initial calibrations from your own instruments.
Pilot program
See what WLTR finds in your initial calibrations.
Bring a recent ICAL. We will show you how each analyte’s reported calibration compares with the best-fit model.
References: EPA SW-846 Test Methods · The NELAC Institute (TNI) · 40 CFR Part 136