Ion-Molecule Reaction & Electron Impact - Mass Spectrometer



The CO2Sense has got a single Ion-Molecule Reaction (IMR-MS) mass spectrometer and is specially designed for monitoring of organic and inorganic impurities in CO2.

The common specifications for CO2 quality for the food and beverages industry like ISBT and EIGA can be fulfilled with the CO2Sense.

Functional Diagram


Typical Applications

  • Final CO2 quality control - monitoring of organic and inorganic impurities in CO2

Measureable Compounds

ISBT Compounds

Substance name Molecular formula
Oxygen O2
Ammonia NH3
Nitrogen Monoxide NO
Nitrogen Dioxide NO2
Methanol CH4O
Total Volatile Hydrocarbons THC
Methane CH4
Acetaldehyde C2H4O
Aromatic Hydrocarbon Content AHC
Benzene C6H6
Toluene C7H8
Xylene C8H8
Total Sulfur Content TSC
Carbonyl Sulfide COS
Hydrogen Sulfide H2S
Carbon Disulfide CS2
Methyl Mercaptan CH3SH
Sulfur Dioxide SO2
Ethyl Mercaptan + Dimethyl Sulfide C2H5SH
Dimethyl Disulfide C2H6S2
Hydrogen Cyanide HCN
Vinyl Chloride VCl
Phosphine PH3

Non-ISBT Compounds

[] Substance name Molecular formula
Propionaldehyde C3H6O
Acetone C3H6O
Ethanol C2H6O
Ethyl Acetate C4H8O2
Acetic Acid C2H4O2
Ethyl Formate C3H6O2
Isobutyl Acetate C6H12O2
Isoamyl Alcohol C5H12O
Isobutyl Alcohol C4H10O
2-Propanol C3H8O
Ethylene C2H4
Propylene C3H6
Butadiene C4H6
Acetylene C2H2
Ethane C2H6
Chloroform CHCl3
1,2 Dichloroethane C2H4Cl2
Trichloroethylene C2HCl3
Tetrachloroethane C2H2Cl4
Bromochloromethane CH2BrCl
Chlorodibromomethane CHBr2Cl
Tribromomethane CHBr3

Typical CO2 Feed Gas Sources and Potential Impurities*


* Source: "Bulk Carbon Dioxide Quality Guidelines And Analytical Methods Reference", ISBT 2010


Technical Data IMR-MS Technical Data IMR-MS
Mass range 7 – 519 amu Ambient temperature 20 °C - 35 °C
Resolution ‹ 1 amu Humidity max. 80 % (non condensing)
Analysis time ›= 1 msec/amu Gas consumption** 30 – 3,000 ml/min
Measuring range* 10^5 Gas inlet temperature unheated
Response time* T90 ‹ 20 msec Gas inlet pressure** 0.1 – 1 bar
Lower detection limit* 0.5 ppb Power 230 V/50 Hz or 115 V/60 Hz 800 W
Concentration drift ‹ ± 5 % over 24 h Dimension (WxHxD) 534 x 743 x 639 mm
Reproducibility ‹ ± 3 % Weight 87 kg
Accuracy ‹ ± 2 %

* depending on the components measured, system setup and the settings

** depending on the type of gas inlet system

Reference Customers (excerpt)


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