VPH Analysis System

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Our VPH Analysis System is GC made easy. Use one of our preconfigured systems for analysis of volatile petroleum hydrocarbons (VPH) in water, soil, and solids based on the Massachusetts VPH and similar methods. Customize your system for specific applications with our expanding line of GC detectors, sample introduction instruments, and autosamplers.

  • Overview

    The System VPH is a complete package tailored to measure aromatic and aliphatic hydrocarbons in environmental samples using the Massachusetts VPH and similar methods. This system can also be customized for analyzing BTEX and other aromatic compounds, volatile gasoline range organics (GRO), and volatile diesel range organics (DRO). The System VPH and System BTEX are identical to the System VOC but customized for analyzing aromatics and aliphatics using the tandem PID/FID detector combination. The PID and FID detectors installed in series using OI Analytical’s patented tandem configuration generate simultaneous aliphatic and aromatic chromatograms in a single analysis. The PID/FID is the required detector for many regulatory methods, such as USEPA Method 8015, Massachusetts VPH, and many GRO methods. Like the System VOC, many used methods in the world specify PID/ FID tandem detectors for VOC methods.

    Principal Applications for the System VPH:

    • Massachusetts Volatile Petroleum Hydrocarbon (VPH) method
    • Benzene, toluene, ethylbenzene, xylenes, and other aromatics (BTEX)
    • USEPA Methods 602, 8015, and 8020; GRO and DRO
    • Leaking underground storage tank monitoring
    • Fuel spills in soils
    • Combined total leachate program
    • Fuels in water (wastewater)
    • ISO 15009 and 15680
    • Standard methods 6200C

    Principal Applications for the System VPH:

    • The standard system package includes all necessary hardware for analysis: Agilent GC, OI Analytical Model 4760 Purge-and-Trap Sample Concentrator, Model 4450 Tandem PID/FID, columns, and standards
    • Sample Concentrator provides built-in Cyclone Water Management, rapid trap heating and cooling, Silcosteel sample pathway, unique protective sparge filter design, and optional Infra-Sparge Sample Heater for improving sample recoveries.
    • Uses the Tandem PID/FID for excellent sensitivity and linearity
    • PID hidden-window design prevents lamp fouling
    • The third detector capability offers additional analyses.
    • Choice of capillary columns
    • Choice of autosamplers available for automated analysis
    • Optional automated pH measurement
    • Includes installation and startup using appropriate standards or methods in systems delivered in the U.S.

  • Specifications
    General Specifications  
    Standard System VPH and System BTEX Hardware
    • Eclipse Purge-and-Trap Sample Concentrator  
    • Model 4450 Tandem PID/FID detector system  
    • Agilent GC
    • OI Analytical low-dead-volume injector or Agilent split/splitless injector
    • Method-appropriate GC capillary column


    Performance Specifications  
    Minimum Detectable Mass  
    PID <40 pg benzene 
    FID 5 pg carbon/second propane
    Dynamic Range  
    PID >106
    FID ±10% over a 106 range
    Communications Interface  Ethernet/LAN connection to the sample concentrator and GC
    Detector Output  1V full-scale analog voltage



    Power Requirements

    110 VAC (±10%), 60 Hz
    220 VAC (±10%), 50 Hz 

    Benchspace Requirements 109.2 linear cm (43 inches) for a standard system
    Gas Requirements Ultrahigh purity H2 , and He (99.999% purity or better)

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