SKC 500-100 User Manual

Operating Instructions

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863 Valley View Road, Eighty Four, PA 15330 USA

Passive Sampler for Formaldehyde

Cat. No. 500-100

Developed in collaboration with the National
Institute of Working Life in Umea, Sweden
and validated by OSHA, the SKC UME
Formaldehyde Passive Sampler collects formalde­hyde in the 5 ppb to 5 ppm range.* The UME
Passive Sampler contains a tape treated with
2,4-dinitrophenylhydrazine (DNPH). Each sampler
incorporates a “blank/correction” section of tape in addition
to the sample section of tape. Analysis is by high-performance
liquid chromatography (HPLC) for identifi cation of formaldehyde
that may be present in the sample. Designed for single use, the SKC

x

UME

100 Passive Sampler is packaged in an aluminized pouch for

easy sample transport to a laboratory.

x

100

x

100

* If sampling in an atmosphere containing formalin, see www.skcinc.com/instructions/1795.pdf for

fi eld study information.

Application Notes

Because of the UMEx 100 Sampler’s relatively high sampling rate and sensitive
analysis, it 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.

www.skcinc.com

Performance Profi le

Sampling Rate 28.6 ml/min with a relative standard deviation of 7.6% at a wind
for Formaldehyde: velocity of 5 to 100 cm/sec for 15 minutes to 24 hours

20.4 ml/min wind velocities < 5 cm/sec for 1 to 7 days

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 (.24 mg/m
8 hr: 5 ppb (.006 mg/m3)
24 hr: 2 ppb (.002 mg/m3)
7 days: 0.2 ppb (.0002 mg/m3)

Shelf-life: 12 mos from date of manufacture at
freezer temperatures (≤39.2 F [4 C])

Storage: Before use: Freezer temperatures (≤39.2 F [4 C])
After use: Freezer temperatures (≤39.2 F [4 C]) and
analyze within 3 weeks

Capacity: 29 μg/sample

Accuracy: ± 25%, exceeds OSHA requirements

Temperature Effects: No effect on sampling rate between 10 and 30 C

Humidity Effects: No effect from 10 to 80% relative humidity (RH).

Do not use sampler below 10% RH.

Wind Velocity Effects:

Interferences:* • Highly specifi c for formaldehyde. Large amounts of

carbonyl compounds may reduce the uptake of formaldehyde

• Use in ozone levels less than 0.5 ppm

Dimensions: 3.4 x 1.1 x .35 in (8.6 x 2.8 x .89 cm)

Weight: 0.38 oz (10.9 gm)

Slide Cover: Green

See the Passive Sampling Guide at www.skcinc.com for
UMEx 100 sampling rates for other aldehydes.

3

)

No effect from 5 to 100 cm/sec

* If sampling in an atmosphere containing formalin, see www.skcinc.com/instructions/1795.pdf for

fi eld study information.

Sampling Instructions

Cautions: • Store at freezer temperatures (≤ 39.2 F [4 C]) before use.

• Do not store with food.

• SKC recommends using gloves when handling chemically

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

• UME

• Do not use Sharpie

treated media.

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

x

samplers are designed for single use only. Do NOT reuse

x

UME

samplers.

®

markers or equivalent to mark label or

pouch as these can off -gas VOCs.