VOST: Volatile Organic Compounds in Gaseous Emissions from Stationary Sources (SW-846 Methods 0030 and 0031)

The Environmental Supply Single and Dual VOST (Volatile Organic Sampling Train) Samplers are used in conjunction with the UNI-VOS-110 Low Flow Control Console to perform SW-846 Methods 0030 and 0031. Volatile organic compounds in the same sample stream are passed through a Pyrex coil condenser followed by cartridges packed with Tenax, Tenax/charcola or Anasorb adsorbent material. The cartridges are thermally desorbed prior to analysis of the volatile organics by gas chromatography/mass spectroscopy.

The V-S1 Single VOST Sampling System uses a single glassware set. The V-S2 Dual VOST Sampling System holds two glassware sets in a single caddy with a 4-way valve at the outlet end to allow continuous sampling. After a sample run, the valve can be switched to the other glassware set for sampling while sorbent cartridges in the first set are changed and leak check is performed. Two separate pumps in the UNI-VOS-110 Console with dual pump option allow simultaneous sampling and leak checking.

The V-S1 Single VOST Sampling System comes with the following:

• Qty 1 V-SC VOST Sample Caddy6
• Qty 1 PRAM-P03-08M 3ft Pyrex Heated Probe Assembly
• Qty 2 PRLM-P03-08 3ft Pyrex Liner, 3/8" with Cup, 5/8"-
• Qty 1 UC-LF-025 25ft Low Flow Umbilical Cable
• Qty 1 M23-RC Submersible Pump
• Qty 1 M5-CB04 4-Impinger Cold Box
• Qty 1 GS-V1 Single VOST Glassware Set

GS-V1 Single VOST Glassware Set includes the following:

• Qty 1 GP-801 Twin Valve
• Qty 2 GP-802-GL Condenser Coil
• Qty 1 GP-803-GL Charcoal Trap
• Qty 1 GP-804-GL Filter Flask
• Qty 1 GP-805-GL Drying Tube
• Qty 1 GP-810 8mm "S" Inlet Adapter
• Qty 2 TFE-SU8M 8mm Teflon Straight Union
• Qty 3 TFE-SU4 1/4" Teflon Straight Union
• Qty 6 TFE-RU4-2 1/4" - 1/8" Teflon Reducing Union
• Qty 4 XT-TFEP-2-1 1/8" x 1/16" Teflon Tubing
• Qty 1 XT-TFEP-4-2 1/4" x 1/8" Teflon Tubing

The V-S2 Dual VOST Sampling System comes with the following:

• Qty 1 V-SC VOST Sample Caddy
• Qty 1 PRAM-P03-08M 3ft Pyrex Heated Probe Assembly
• Qty 2 PRLM-P03-08 3ft Pyrex Liner, 3/8" with Cup, 5/8"-
• Qty 1 UC-LF-025 25ft Low Flow Umbilical Cable
• Qty 1 M23-RC Submersible Pump
• Qty 1 M5-CB04 4-Impinger Cold Box
• Qty 1 GS-V2Dual VOST Glassware Set

GS-V2 Dual VOST Glassware Set includes the following:

• Qty 2 GP-801 Twin Valve
• Qty 4 GP-802-GL Condenser Coil
• Qty 2 GP-803-GL Charcoal Trap
• Qty 2 GP-804-GL Filter Flask
• Qty 2 GP-805-GL Drying Tube
• Qty 1 GP-807 8mm Inlet "Y" Adapter
• Qty 3 GP-810 8mm "S" Inlet Adapter
• Qty 3 TFE-SU8M 8mm Teflon Straight Union
• Qty 6 TFE-SU4 1/4" Teflon Straight Union
• Qty 12 TFE-RU4-2 1/4" - 1/8" Teflon Reducing Union
• Qty 8 XT-TFEP-2-1 1/8" x 1/16" Teflon Tubing
• Qty 5 XT-TFEP-4-2 1/4" x 1/8" Teflon Tubing

The UNI-VOS-ACD Low Flow Control Console is the ideal metering control console for accurate volume measurements in low flow gas sampling methods requiring sample rates from 0.5 to 2 liters per minute. Flow rate adjustments, gauges and temperature readouts on the console and the 0.01 Liter resolution of the dry gas meter allow the tester to maintain a constant and accurate flow rate while monitoring gas meter pressure, and five remote temperatures received from the sample caddy.

Two digital temperature controllers are provided for maintaining probe and filter heat control where applicable.

To better understand the analytical method behind VOST, please go to our Analytical Guide: Method 0030/5041A/8260B VOST.

VOST: Volatile Organic Compounds in Gaseous Emissions from Stationary Sources (SW-846 Methods 0030 and 0031)
Item # VOST 

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