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 are customized for analyzing aromatics and aliphatics by 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 include: 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; and standard methods 6200C.
VPH Analysis System Features:
- 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
- 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.
|Standard System VPH and System BTEX Hardware||
|Minimum Detectable Mass|
|PID||<40 pg benzene|
|FID||5 pg carbon/second propane|
|FID||±10% over a 106 range|
|Communications Interface||Ethernet/LAN connection to the sample concentrator and GC|
|Detector Output||1V full-scale analog voltage|
110 VAC (±10%), 60 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)|