SKC 500-200 User Manual

Operating Instructions

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863 Valley View Road, Eighty Four, PA 15330 USA

Passive Sampler for Sulfur Dioxide

Cat. No. 500-200

Performance Profi le

Sampling Rate: 15.2 ml/min with a relative standard deviation of 16.5%

Validated Concentration
Range: 0.4 to 8 ppm, 15 minutes to 24 hours

Analysis Method: Solvent extraction and IC analysis with conductivity detection

Lower Detection Limits: 15 minutes: 170 ppb
8 hours: 5.3 ppb

Collection Method: Tape treated with triethanolamine (TEA); built-in blank

Shelf-life: 18 months from date of manufacture at ambient temperature

Storage: Before use: Ambient temperature

After use: Analyze within 3 weeks. Can be stored at ambient

Accuracy: ± 30%

Temperature Effects: No effect on sampling rate from 20 to 25 C

Humidity Effects: No effect from 20 to 80% relative humidity (RH)

Wind Velocity Effects:

Interferences: None identifi ed

Dimensions: 3.4 x 1.1 x 0.35 in (8.6 x 2.8 x 0.89 cm)

Weight: 0.38 oz (10.9 gm)

Slide Cover: Yellow

24 hours: 1.8 ppb

included

temperature or at ≤ 39.2 F (4 C)

No effect from 5 to 100 cm/sec

Note: NO2 can be analyzed on the same UMEx 200 Sampler as SO2.

Sampling Instructions

Cautions: • Do not store with food.

• Before sampling, check the expiration date on the label on the

• SKC recommends using gloves when handling chemically

• UMEx samplers are designed for single use only. Do NOT reuse

1. Open the aluminized pouch and remove the sampler. Do not discard the pouch;

use it to send sampler to the laboratory. Store the pouch away from potential

sulfur dioxide sources.

2. Enter date and location in the space provided on the back of the sampler.

3. Position the sampler on a worker’s collar for personal sampling or in an
appropriate location for area sampling.

4. Slide the sampler cover to the “on” position to begin sampling. Enter the sample
start time in the space provided on the back of the sampler.

5. A er sampling for the desired time, up to 24 hours, slide the sampler cover
to the “off ” position to stop sampling. Enter the sample stop time in the space
provided on the back of the sampler.

6. Place the sampler in the original pouch immediately a er sampling.

outside of the pouch. Do not use a er the last day of the month
indicated.

treated media.

x

UME

samplers.

7. Seal the pouch. Send pertinent information and sample to an accredited
laboratory for analysis.

Analysis Instructions for Sulfur Dioxide

Calibration Standards - Sulfate

Purchase commercially available sulfate standards appropriate for your application.
Prepare a range of sulfate standards in de-ionized ultra-fi ltered (DIUF) water and
prepare as outlined in Sample Preparation. Note: Standards for sulfur dioxide

require a 1:1 dilution with 0.15% hydrogen peroxide.

Sample Preparation for Sulfur Dioxide

1. Remove the sampler from the pouch and the sliding cover from the sampler.

2. Use clean forceps to li out the reactive tape from each section. Place each
section in a sealed vial. This provides a sample and a blank/correction.

Note: The blank/correction section of tape has an indentation for easy identifi cation.

3. Sulfate is desorbed from both the sample and the blank/correction tapes by
inserting each in its own 4-ml glass vial containing 2 ml of de-ionized DIUF
water and placing them on a vibrator/shaker for 20 minutes.