User guide

Coated Filters

Cat. No. 225-9011

Method & Chemical: MDHS 25/3 (U.K.) for Organic Isocyanates; PI, TDI,

HDI, MDI.

Filter & Coating: 25-mm glass ﬁ ber ﬁ lter coated with 1-(2-methoxyphenyl)

piperazine. Filters only, not loaded in casse es

Prior to Sampling: Store at ≤ 39.2 F (4 C) for up to 6 months.

Sample Stability: Store TDI at ≤ 39.2 F (4 C) for up to 90 days. No data is

available for PI, HDI, and MDI.

For information on other available

coated ﬁ lters, request SKC Publication 1219.

Operating Instructions

863 Valley View Road, Eighty Four, PA 15330

Tel: 724-941-9701 Fax: 724-941-1369

www.skcinc.com

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 Warranty and Return Policy, go to http://www.skcinc.com/warranty.asp.

How to Use the SKC Coated Filters

1. 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 ﬁ lter casse e for

sample collection. Attach the cassette 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. Store sample at ≤ 39.2 F (4 C) for up to 90 days. Appropriately package

samples, blanks, and all pertinent data to send to a lab for analysis. Expedite

shipping of samples to laboratory. Friday shipments are not recommended.

Form 40040 Rev 1303