Operating Instructions
863 Valley View Road, Eighty Four, PA 15330
Tel: 724-941-9701 Fax: 724-941-1369
www.skcinc.com
Preloaded Coated Filters
Cat. No. 225-9013
SKC coated fi lters are shipped preloaded in the casse es with end plugs and
shrink bands in place. No assembly is required; they are ready to use.
Method & Chemical: ASTM D5836 for 2,4-TDI and 2,6-TDI. OSHA 42* for
HDI, 2,4-TDI, and 2,6-TDI. OSHA 47 for MDI
* OSHA Method 42 specifi es a fi lter loading of 0.1 mg of 1-(2-pyridyl) piperazine. OSHA 47 and
ASTM D5836 specify a fi lter loading of 1 mg of 1-(2-Pyridyl) piperazine; however, Coated
Filters 225-9002 (loading of 2 mg to increase stability and shelf-life of fi lters) and 225-9013
(loading of 1 mg) are acceptable for all of these sampling methods.
Filter & Coating†: Glass fi ber fi lter and cellulose support pad coated with
1-(2-methoxyphenyl) piperazine. Three-piece 37-mm casse e. Open-face
sampling confi guration
Prior to Sampling: Store at ≤ 39.2 F (4 C) for up to 3 months.
Sample Stability: Store samples of 2,4-TDI, 2,6-TDI, and HDI at ≤ 39.2 F (4 C)
for up to 18 days. Refer to the methods above for other compounds.
How to Use the SKC Preloaded Coated Filters
1. Select one coated fi lter casse e for calibrating the fl ow rate. A red plug
secures the inlet, which is clearly marked “inlet,” and a blue plug secures the
outlet. Set up the sampling train for calibration with the representative fi lter
casse e in line. For “closed-face” sampling, remove the plugs and connect the
casse e to the sampling train. For “open-face” sampling, remove the outlet
plug and the casse e inlet section then connect the casse e to the sampling
train. For details on se ing up a sampling train, refer to the SKC Sample Setup
Guide “Sampling Train - Filters and Cyclones” (SKC Publication 1166).
2. Calibrate the pump to the desired fl ow rate using a fi lm fl owmeter or
calibrated precision rotameter. For details on calibrating a pump, refer to the
SKC Sample Setup Guide “Calibrating a Pump Using a Film Flowmeter” (SKC
Publication 1163).
3. Replace the casse e used for calibration with a fresh coated fi lter casse e
for sample collection. A ach the casse e to a worker’s collar, as close to the
breathing zone as possible, by using a fi lter casse e holder (SKC Cat. No.
225-1). Sample for the specifi ed time interval and record the time.
4. Remove the fi lter casse e at the end of the specifi ed sampling period and
replace both end plugs (and the inlet if necessary). Recheck the fl ow rate using
the same casse e and fl owmeter used for calibration (in Step 2) to ensure that
the fl ow rate has not changed by more than 5%.
5. See Sample Stability on reverse side for sample storage. Analyze samples as soon
as possible. Appropriately package samples, blanks, and all pertinent data to
send to a lab for analysis. Ship samples under refrigerated conditions via next
day air to arrive at the lab on the following business day. Friday shipments
are not recommended.
† Custom order due to very limited shelf-life.
For information on other available
coated fi lters, request SKC Publication 1219.
SKC Limited Warranty and Return Policy
SKC products are subject to the SKC Limited Warranty and Return Policy, which
provides SKC's sole liability and the buyer's exclusive remedy. To view the complete
SKC Limited W arranty and Return Policy, go to http://www.skcinc.com/warranty.asp.
Form 40042 Rev 1303
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