Operating Instructions
863 Valley View Road, Eighty Four, PA 15330 USA
Tel: 724-941-9701 • www.skcinc.com
Passive Sampler for Formaldehyde
Cat. No. 500-100
Performance Pro
fi
le
Sampling Rate:
28.6 ml/min with a relative standard deviation of 7.6% at a wind velocity of
5 to 100 cm/sec for 15 min to 24 hrs
20.4 ml/min wind velocities < 5 cm/sec for 1 to 7 days
See the Passive Sampling Guide at www.skcinc.com for UMEx
100 sampling rates for other aldehydes.
Validation Range:
0.06 to 3.0 ppm
Detection Principle:
Formation of stable DNPH-hydrazone in the presence of formaldehyde*
Analysis Method:
Solvent extraction and analysis by HPLC (high-performance liquid chromatography) with UV detection
Lower Detection Limits:
15 min: 200 ppb (0.24 mg/m
3
)
8 hr: 5 ppb (0.006 mg/m
3
)
24 hr: 2 ppb (0.002 mg/m
3
)
7 days: 0.2 ppb (0.0002 mg/m
3
)
Shelf-life:
12 mos from date of manufacture at
≤
39.2 F (4 C)
Storage:
Before use:
≤
39.2 F (4 C)
After use:
≤
39.2 F (4 C) and analyze within 3 wks
Capacity:
29
μ
g/sample
Accuracy:
± 25%, exceeds OSHA requirements
Temperature Effects:
No e
ff
ect on sampling rate between 10 and 30 C
Humidity Effects:
No e
ff
ect from 10 to 80% relative humidity (RH).
Do not use sampler below 10% RH.
Wind Velocity Effects:
No e
ff
ect from 5 to 100 cm/sec
Interferences:*
• Highly speci
fi
c for formaldehyde. Large amounts of carbonyl compounds may reduce the uptake of formaldehyde
• Use in ozone levels < 0.5 ppm
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)
* If sampling in an atmosphere containing formalin, see www.skcinc.com/instructions/1795.pdf for
fi
eld study information.
Description
The UMEx 100 Passive Sampler for Formaldehyde has a green sliding cover that opens and closes easily to start and stop sampling. Because
of its relatively high sampling rate and sensitive analysis, the UMEx 100 can be used for 15-minute (STEL) sampling in the ppm range,
personal monitoring up to 12 hours, and 24-hour to 7-day monitoring of contaminants found in indoor environments.
Sampling
• UMEx samplers are designed for single use only. Do NOT reuse UMEx samplers.
• Do not use Sharpie
®
markers or equivalent to mark label or pouch as these can off-gas VOCs.
2
1. Open the pouch and remove the sampler.
Do not discard the
pouch as it is used to protect the sampler during shipment
to the laboratory.
Store the pouch away from potential
formaldehyde sources.
Note:
Inside the pouch is a small length
of tape similar to the tape inside the sampler. This tape protects
the background of the sampler should any formaldehyde in the
atmosphere enter the pouch. Leave the tape inside the pouch at all
times and send along with the sample to the laboratory.
2. Write the date, location, and
sample start time on the label 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 (di
ff
usion plate
exposed) to begin sampling.
5. After sampling for the desired
time, slide the sampler cover
to the “o
ff
” position (di
ff
usion
plate covered) to stop sampling.
6. Enter the sample stop time on
the label on the back of the
sampler.
7. Immediately place the sampler
in the original pouch and
seal the pouch. Send it, along
with pertinent information,
to an accredited laboratory
for analysis.
Use expedited
shipping.
4
5
7
6
&
500-100