IROA TruQuant IQQ (CAT NO: WORKFLOW $200) is a high-quality quantitation system that utilizes two (2) complex Internal Standards to make accurate measurements of several hundred metabolites simultaneously in experimental samples and measure day-to-day (QA/QC) platform reproducibility.


  1. IROA LONG-TERM REFERENCE STANDARD  IROA-LTRS (paired 1:1 mixture of labeled U-5% and – 95% U-13C metabolites): ID and QC – analyze separately to build a triply redundant dictionary (library) of RT, m/z and physical characteristics including fragmentation data and to account for fluctuations in mass and RT.
  2. IROA INTERNAL STANDARD – IROA-IS (labeled 95% U-13C metabolites): – spike into experimental samples and use as a yardstick in which to QUANTIFY all biochemicals in the sample relative to their counterparts in the IROA-LTRS. Even if analyzed on a different chromatographic system, results can be equated using dictionary because of the IROA-IS. Experimental compounds may have different RTs but will exhibit the same mass and physical characteristics.

IROA TruQuant IQQ Workflow 3 step process

  1. LC-MS analysis of experimental samples with IROA-IS.  Inject IROA-LTRS periodically i.e. 10 sample intervals, as QC Standard to account for fluctuations in mass and retention time drift.
  2. Generate “dictionary” of RT, m/z, formula and physical characteristics from the analysis of IROA-LTRS using ClusterFinder software.
  3. ClusterFinder software and dictionary identifies/quantitates, suppression corrects and normalizes compounds in experimental samples.

Summary of Benefits of the IROA TruQuant (IQQ) Measurement System

  • Cost effective simultaneous metabolite identification and quantitation
    Spiked-in standard containing 100’s of identified compounds allows accurate compound formula ID for MS alone; complete ID with addition of SWATH, or IM, even at low concentrations
  • Unique IROA patterns discriminate peaks of biological origin from artefactual peaks allowing the removal of false data
  • All IROA-based fragments will have the IROA ratio pattern of their parent peaks and can be identified using the “peak correlation” ClusterFinder module
  • Alignment of all peaks in the chromatogram using IROA-IS generated Retention Time (RT) ladder
  • Retention Index within the sample allows “unknowns” to be tracked with accuracy and precision
  • Suppression-corrected measurements for significantly better quantitation
  • Normalizes (suppression-corrected) experimental samples to overcome day-to-day, instrument-to-instrument variances
  • ClusterFinder software solution builds libraries, IDs/quantitates compounds and normalizes data
  • Ensures high level QC for accurate and reproducible results

Background reading

User Manual

POSTER – Correction of Ion Suppression and Normalization for Improved Quantitative Rigor and Reproducibility using IROA

WHITEPAPER – Integration of Standards for Ion Suppression Correction and QC in an Untargeted Metabolomics Workflow