# Lumo applies machine learning to predict response factors > Source: > Published: 2026-06-05 10:52:59.387159+00:00 # Lumo applies machine learning to predict response factors RQM+ and Jordi Labs materials describe Lumo as an in-silico tool for extractables and leachables (E&L) workflows that predicts LC-MS and GC-MS response factors from molecular descriptors. Per RQM+, Lumo routes compounds by chemistry class and uses MLP neural-network sub-models, with built-in checks that flag low-confidence predictions for expert review. An interview with Dr. Anthony Grice and a peer-reviewed paper in the PDA Journal of Pharmaceutical Science and Technology report the models were trained on a database of over 300 experimentally measured response factors (Deng, Grice, Louis, et al., 2026). RQM+ positions the product for non-targeted screening and semi-quantitative phases and cites ISO 10993-18:2020 as alignment for risk-based workflows. Editorial analysis: Labs seeking to cut calibration workload will watch whether class-specific MLP ensembles and confidence flags reduce follow-up calibrations without introducing new bias. ### What happened RQM+ and Jordi Labs released product and technical materials describing **Lumo**, an in-silico response-factor prediction capability for extractables and leachables analysis. Per RQM+ product pages, **Lumo** predicts **LC-MS** and **GC-MS** response factors from molecular descriptors and routes compounds to chemistry class-specific sub-models, with automated checks that flag low-confidence outputs for expert review. A peer-reviewed article published in the **PDA Journal of Pharmaceutical Science and Technology** (Deng, Grice, Louis, et al., 2026) documents the neural-network methodology, and an interview with **Dr. Anthony Grice** describes training on a database of over **300** experimentally measured response factors. ### Technical details Per the peer-reviewed paper and the interview, the modeling approach uses MLP neural networks trained on molecular descriptors derived from chemical structure. The implementation is a tiered ensemble: an initial classifier assigns a compound to a functional-group or chemistry class, then routes the compound to a specialized sub-model trained on that class. The published work and product materials emphasize two engineering features: built-in confidence or uncertainty checks that flag low-confidence predictions, and a training set curated to cover diverse chemistries rather than only easily sourced standards. ### How it is positioned in workflows RQM+ product documentation lists typical uses for **Lumo** during non-targeted screening and semi-quantitative phases, with the aim of shortening turnaround time, reducing the number of empirical reference standards needed, and focusing full calibrations on prioritized compounds. RQM+ cites alignment with **ISO 10993-18:2020** for risk-based chemical characterization in medical device evaluation. ### Editorial analysis - technical context Industry-pattern observations: Analytical labs commonly rely on surrogate standards when reference materials are unavailable, which can introduce order-of-magnitude errors in mass-spectrometry quantitation. Ensemble approaches that combine chemistry-aware routing with sub-model specialization, like the class-specific MLP design documented here, are a standard way to reduce heterogeneity across chemical classes. Confidence-flagging is an increasingly common safety valve in predictive analytical tools; it supports human-in-the-loop review of edge cases and helps integrate models into regulated workflows. ### Context and significance Editorial analysis: For practitioners, the combination of a peer-reviewed methodology, a stated training corpus of over **300** measured response factors, and explicit confidence metrics lowers the bar for technical due diligence when evaluating in-silico quantitation tools. That said, the value of prediction-driven calibration depends on how often flagged cases require empirical follow-up and on how well the training set represents the lab's chemical space. ### What to watch - •Whether independent validation studies reproduce the error distributions reported in the peer-reviewed paper across diverse instrument platforms. - •How often **Lumo** flags low-confidence predictions in real screening runs, and what fraction of flagged compounds proceed to full calibration. - •Adoption signals from analytical-service labs or device manufacturers referencing ISO-aligned, risk-based use of predicted response factors. ## Scoring Rationale Lumo is a peer-reviewed, niche machine-learning tool that predicts mass-spectrometry response factors for extractables and leachables testing in pharma and medical devices. The published methodology and confidence-flagging make it credible and useful, but the impact is confined to a specialized analytical-chemistry workflow rather than the broad AI/DS/ML field. Scored as a solid vertical-deployment tool. Practice interview problems based on real data 1,500+ SQL & Python problems across 15 industry datasets — the exact type of data you work with. [Try 250 free problems](/problems)