SKC 500-200 UMEx 200 Passive Sampler for Nitrogen Dioxide - Manual (Page 2)

Sampling Instructions
Cautions: • Do not store with food.
• Before sampling, check the expiration date on the label on the
outside of the pouch. Do not use aft er the last day of the month
indicated.
• SKC recommends using gloves when handling chemically treated
media.
• UME
x
samplers are designed for single use only. Do NOT reuse
UME
x
samplers.
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
nitrogen 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. Aft 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 aft er sampling.
7. Seal the pouch. Send pertinent information and sample to an accredited
laboratory for analysis.
Analysis Instructions for Nitrogen Dioxide
Calibration Standards - Nitrite
Purchase commercially available nitrite standards appropriate for your application.
Prepare a range of nitrite standards in de-ionized ultra-fi ltered (DIUF) water and
prepare as outlined in Sample Preparation.
Sample Preparation for Nitrogen Dioxide
1. Remove the sampler from the pouch and the sliding cover from the sampler.
2. Use clean forceps to lift 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. Nitrite 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.