The Vocus Cork Analyzer quantitatively determines TCA levels below the sensory threshold in individual cork wine stoppers in 3 seconds

Accelerate production and delivery of premium quality cork wine stoppers with the world’s first high-throughput, industrial solution for off-flavor analysis and sorting

Off-Flavor Analysis of Every Cork Wine Stopper

The Vocus Cork Analyzer tests individual stoppers for the presence of TCA and other off flavors and automatically sorts the stoppers according to detected concentrations.

  • High-Throughput Industrial Solution.
    The industrial scale autosampler and sorter enable automated processing of >15’000 stoppers per day.
  • Trace-Level Detection in Seconds.
    TCA is quantified below the sensory threshold in a single stopper in 3 seconds.
  • Adjustable Thresholds for Stopper Sorting.
    Analyzed stoppers are sorted into high precision TCA concentration categories.

Guarantee Cork Stopper Quality With Advanced Mass Spectrometry

The Vocus Cork Analyzer couples our fast, sensitive Vocus mass spectrometer to an industrial scale autosampler and sorter.   Stoppers are analyzed directly without any soaking or destruction.   TCA is measured quantitatively with high sensitivity and precision.

Linear Quantitative Response

The intensity of the signal recorded by the Vocus Cork Analyzer is directly proportional to TCA concentration, enabling accurate determination of TCA levels in individual cork stoppers.

Linear Quantitative Response
Signals recorded by the Vocus Cork Analyzer for a set of externally calibrated cork stoppers having TCA concentrations between 0.3 and 20 ng/L, each measured for 3 seconds.

Ultra-Low Detection Limits in Seconds

The Vocus Cork Analyzer rapidly measures TCA below the sensory threshold in individual cork stoppers and physically sorts each stopper according to the detected concentration.

Measured TCA concentrations for a set of 100 stoppers (3 second/cork; 5 minutes total; logarithmic plot). A sensory panel identified stoppers shown in red as being contaminated with TCA and determined those in green to be clean. The Vocus measurements identify the same contaminated corks as the sensory panel, and further identify many other stoppers with concentrations close to 0.5 ng/L.


The Vocus Cork Analyzer precisely reports TCA concentrations – reproducing the same results for individual stoppers measured repeatedly across weeks.

A set of cork stoppers having a wide range of TCA concentrations was measured twice, with two weeks between measurements. The measured concentrations for each stopper were consistent across the successive measurements.

High-Throughput Off-Flavor Analysis

Compatible Cork Stoppers   

  Material: Natural cork
  Outer diameter: 24 – 26 mm
  Length: 39 – 54 mm

Analysis Time  

  3 seconds per stopper

Stoppers / Year  

  > 6’000’000

Limit of Detection, TCA  

  0.05 ng/L*

Maximum Concentration, TCA  

  5000 ng/L*

Sorting Bins  

Up to 4 operator-defined concentration ranges

     w x d x h  

3.31 x 2.45 x 2.00 m
Excluding cork stopper feeder

*Equivalent to the releasable TCA analysis performed in accordance to ISO 20752

Vocus Cork Analyzer Assembly

Vocus Cork Analyzer Publications


Cappellin, L.; Lopez-Hilfiker, F.; Pospisilova, V.; Ciotti, L.; Pastore, P.; Gonin, M.; Hutterli, M.A.  Thermal Desorption – Vocus enables on-line non-destructive quantification of 2,4,6-trichloroanisole in cork stoppers below the perception threshold.  Analytical Chemistry, 2020In FocusDOI: 10.1021/acs.analchem.0c01326

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The Vocus Cork Analyzer is an Industrial Solution​

Operation of the Vocus Cork Analyzer is fully automated for high-throughput analysis of cork wine stoppers in your production facility. Corks are processed in 3 simple steps.

  1. Load. Stoppers are loaded by a cork feeder.
  2. Analyze. An individual cork is analyzed for off-flavors in 3 seconds.
  3. Sort. Stoppers are sorted into user-defined categories based on the results of analysis.
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