Diffusion Caps for Method 325 Tubes, 10/pk

Replacement caps for 226-520 tubes for Benzene monitoring with EPA Method 325. Pk/10

Features:

• Benzene uptake rate of 0.67 ml/min
• Use to determine average benzene concentration in the range of 0.5 to 500 µg/m3 over a two-week periods
• Analyze by GC-FID or GC-MS as specified in EPA 325B
• Reusable

Meets specifications of U.S. EPA 325:

• 3.5 x 0.25-inch OD (Sized for Perkin Elmer and Markes International Thermal Desorbers) stainless steel tube deactivated with SilcoNert 2000
• Pre-conditioned Carbopack X or Anasorb GCB1 sorbent held between two 100-mesh stainless steel screens
• Brass Swagelok screw caps with PTFE ferrules
• Diffusion cap
• Unique identification number and bar code
• Sampling arrow indicator

Weatherproof tube shelter available:

• Establish baseline/manage exceedances for benzene and other HAPs and VOCs. See Technical Note: Sampling Rates for Benzene and Other VOCs Using the SKC Passive TD Tube(PDF)
• Establish baseline/manage exceedances for benzene
• Ideal for establishing average airborne concentrations of additional VOCs of concern

Specifications:

• Sorbent: Carbopack X, Anasorb GCB1 (see Reference)
• Tube Material: Stainless steel coated with SilcoNert 2000, sealed with brass Swagelok screw caps fitted with PTFE ferrules
• Uptake Rate: Benzene 0.67 ml/min
• Dimensions: 3.5 x 0.25-inch OD (Sized for Perkin Elmer and Markes International Thermal Desorbers)
• Analysis: GC-FID or GC-MS (EPA 325B)