DVLS Low Oxygenates Analyzer

Da Vinci Laboratory Solutions offers an Oxygenates Analyzer to determine oxygenate traces in Hydrocarbon Matrices according to ASTM D7059, D7423 and D7754.

Trace Oxygenates Analysis

The DVLS LowOx Analyzer contains a PTV inlet with backflush to detect the oxygenate traces with the FID detector. The use of the PTV inlet with backflush configuration allows to backflush the heavier matrix components without contaminating the inlet and columns.

Ethylene is injected by a Gas Sampling Valve. Injection of liquefied gasses can be done either by a Liquid Sampling Valve or Gas Sampling Valve. A Pressure Station is used for sample handling prior to the analysis. Liquid samples are injected by the Automatic Liquid Sampler.

The sample will be separated using an pre-column followed by an analytical column and by using a heart cut deans switch. The oxygenates will then be separated by carbon number. Pre-column and the analytical column are linked. High boiling point compounds are retained in the pre-column. Oxygenates and low boiling point hydrocarbon elute into analytical column. Oxygenates are trapped at the front of the analytical column. The high boiling compounds are then transferred to the monitor column and detected by the FID.

  • Applications

    • The Low Ox Analyzer characterizes:

      • The composition of methanol traces in crude oils according to ASTM D7059
      • The composition of oxygenate traces, such as alcohols and ethers, in (liquefied) gases in the C2-C5 range according to ASTM D7423
      • The composition of oxygenate traces in automotive spark-ignition engine fuels according to ASTM D7754
    • The linear working range for oxygenates is at least 0.50 mg/kg to 100 mg/kg in C2 to C5 streams.
    • The linear working range methanol in Crude oil is at least 15 mg/kg to 900 mg/k
  • Configuration

    The DVLS LowOx Analyzer is based upon the Agilent Gas Chromatograph configured with:

    • Flame Ionization Detector (FID) with high scanning rate
    • Automatic Liquid Sampler with a 16 position tray
    • DVLS PTV inlet with a backflush configuration
    • Capillary columns

    The Agilent GC is controlled by Agilent OpenLab EZChrom software. The OpenLAB software is used for instrument control, data acquisition, peak integration and calibration.

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