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UMEX 100 Passive Sampler
Exponentially Better Collection of Formaldehyde

UMEx 100 passive sampler with callouts
  • Accurate and reliable for formaldehyde collection
    • Accuracy exceeds OSHA standards
    • Uses popular 2,4-DNPH chemistry
    • Validated by OSHA and Swedish Institute

  • Economical and easy to use
    • No pump or training required
    • Low-cost sampler
    • Sample medium and blank/correction in one unit

  • Conforms to EU ISO 16000-4-2004

  • Meets specifications of OSHA Method 1007

  • Referenced in EPA IP-6C

  • Highly sensitive and specific analysis method

  • Small and unobtrusive

  • Simple-to-use "on/off" sliding cover

  • Safe
    • No glass or chemical liquids in the sampler

  • Low 2 ppb limit of detection

  • 28.6 ml/min uptake rate enhances sensitivity for 15-minute, 8-hour, and 24-hour sampling*

  • Versatile sampler
    • Workplace sampling from 15 minutes to 12 hours
    • Indoor air sampling with validated rates for 24-hour or 7-day samples*
* Sampling periods between 24 hours and 7 days have not been evaluated.
If sampling in an atmosphere containing formalin, see Sampling Formaldehyde from Formalin Using Passive Samplers (PDF) for field study information.

 

UMEX Downloads

UMEX 100 Research Report (PDF)

UMEX 100 Operating Instructions (PDF)

UMEX 100 Spec. Sheet (PDF)

Tech. Note: Sampling Formaldehyde from Formalin Using Passive Samplers (PDF)

UMEX 100 Español Folleto

EPA IP-6 Method Update: Determination of Formaldehyde and Other Aldehydes in Indoor Air (PDF)

List of Laboratories for Analyzing 500-100 UMEX 100 Passive Samplers

For a listing of Parameters for Laboratory Analysis, see 500-100 UMEX Sampler Parameters.

 

UMEX 100 Passive Sampler for Formaldehyde
The exponentially better UMEX 100 Passive Sampler for formaldehyde was developed in collaboration with the National Institute of Working Life in Umea, Sweden. Constructed of tough polypropylene, the single-use UMEX 100 contains a tape treated with 2,4-dinitrophenylhydrazine (DNPH) for reliable collection of formaldehyde. Samplers are provided in individual aluminized pouches that can be used to transport the sampler to a laboratory after sampling. For convenience and quality control assurance against contamination, each sampler incorporates a "blank/ correction" section in addition to the active sampling section so there is no need to send extra samplers to the laboratory. The shelf-life date is printed on a label on the outside of each pouch for easy inventory management. The UMEX 100 Sampler includes a clip for attachment to a worker’s collar for personal sampling or in an appropriate location for area sampling.

Using the UMEX 100 Passive Sampler
Sampling with the UMEX 100 Passive Sampler for formaldehyde is easy and requires no pump or training. Simply remove the sampler from the pouch, record sampling information, and slide the cover to the "on" position. Clip the sampler on a worker for personal sampling up to eight hours or in an appropriate location for area sampling up to 24 hours or for 7 days (sample periods between 24 hours and 7 days have not been evaluated). When sampling is complete, simply slide the cover to the "off" position, place the sampler back in the pouch immediately, and seal. Send the sampler to an accredited laboratory for analysis by highperformance liquid chromatography. The UMEX 100 sampler is designed for single use only. Do not reuse UMEX samplers.



UMEX 100 for Other Aldehydes
UMEX 100 can be used to sample other aldehydes. See the Passive Sampling Guide for UMEX 100 sampling rates for other aldehydes or check below for calculated sampling rates.

Compound
Sampling Rate
(ml/min)
Acetaldehyde
23.1
Benzaldehyde
14.1
Butyraldehyde
16.5
Glutaraldehyde
14.3

UMEX 400 for Amines
UMEX 400 contains a tape treated with 1-Naphthylisothiocyanate (NITC) for the passive collection and analysis of ppm-level aliphatic amines such as methyl amine, dimethyl amine, isopropyl amine, ally-amine, and n-butyl amine. Analysis is by high-performance liquid chromatography with UV detection (HPLC-UV). See UMEX 400 for Amines for more information.

UMEX 200 for Sulfur Dioxide and/or Nitrogen Dioxide
UMEX 200 uses tape treated with triethanolamine (TEA) for the passive collection and analysis of sulfur dioxide and/or nitrogen dioxide. Analysis is by ion chromatography (IC) with conductivity detection. See UMEX 200 for Sulfur Dioxide and/or Nitrogen Dioxide for more information.

Performance Profile

Sampling Rate for Formaldehyde 28.6 ml/min with an RSD of 18% for 15 min to 8 hr or 24 hr
20.4 ml/min for 7 days*
Concentration Range 5 ppb to 5 ppm
Lower Detection Limits 15 min: 200 ppb (.24 mg/m3)
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 < 39.2 F (4 C)
Capacity 29 µg/sample
Analysis High-performance liquid chromatography (HPLC) with UV detection
Accuracy ± 25%, exceeds OSHA requirements
Storage Before use: < 39.2 F (4 C)
After use: < 39.2 F (4 C) and analyze within three weeks
Do not store with food.
Temperature Effects No effect on sampling rate between 10 and 30 C
Humidity Effects No effect from 10 to 80% relative humidity; do not use below 10% RH
Wind Effects No effect from 0.05 to 1.0 m/s; good correlation at 0.02 m/s
Interferences 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 .35 ins (8.6 x 2.8 x .89 cm)
Weight 0.38 oz (10.8 gm)
* Sampling periods between 24 hours and 7 days have not been evaluated.
. If sampling in an atmosphere containing formalin, see Sampling Formaldehyde from Formalin Using Passive Samplers for field study information.

 

Sampling Rate for Formaldehyde

28.6 ml/min with a RSD of 18% (for 15-min to 8-hrs or 24-hrs*)
20.4 ml/min (7 days) *

See the Passive Sampling Guide for UMEX 100 sampling rates for other aldehydes.

Detection Principle
Formation of stable DNPH (2,4 dinitrophenylhydrazine) in the presence of formaldehyde
Concentration Range
5 ppb to 5 ppm
Lower Detection Limits
15-min: 200 ppb (0.24 mg/m3)
8-hrs: 5 ppb (0.006 mg/m3)
24-hrs*: 2 ppb (0.002 mg/m3)
7 days* : 0.2 ppb (0.0002 mg/m3)
Shelf-life
12-mo from date of manufacture at < 39.2F (4C)
Capacity
29 µg/sample
Analysis
Desorption of hydrazine and analysis by high-performance liquid chromatography (HPLC) with UV detection
Accuracy
± 25%, exceeds OSHA requirements
Storage
Before use: < 39.2 F (4C)
After use: < 39.2 F (4C) and analyze within three weeks
Do not store with food.
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 Effects
No effect from 0.05 to 1.0 m/s;
good correlation at 0.02 m/s
Interferences
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 .35 in (8.6 x 2.8 x .89 cm)
Weight
0.38 oz (10.8 gm)
* Sampling periods between 24 hours and 7 days have not been evaluated.
Note:. If sampling in an atmosphere containing formalin, see Sampling Formaldehyde from Formalin Using Passive Samplers for field study information.

 

UMEX Downloads

UMEX 100 Research Report (PDF)

UMEX 100 Operating Instructions (PDF)

UMEX 100 Spec. Sheet (PDF)

Tech. Note: Sampling Formaldehyde from Formalin Using Passive Samplers (PDF)

UMEX 100 Español Folleto

EPA IP-6 Method Update: Determination of Formaldehyde and Other Aldehydes in Indoor Air (PDF)

List of Laboratories for Analyzing 500-100 UMEX 100 Passive Samplers

For a listing of Parameters for Laboratory Analysis, see 500-100 UMEX Sampler Parameters.

Ordering Information      

Description Qty. Cat. No.

UMEX 100 Passive Sampler for Formaldehyde and other Aldehydes, individually packaged in aluminized pouch

Designed for single use only. DO NOT reuse UMEX samplers.
Limited shelf-life; storage required at < 39.2F (4C). Do not store with food.
10 500-100
Treated Tape, for QC purposes only pk/50 P20084
. If sampling in an atmosphere containing formalin, see Sampling Formaldehyde from Formalin Using Passive Samplers for field study information.

References

Levin, J.O. and Lindahl, R., "Diffusive Air Sampling of Reactive Compounds - A Review," Analyst, Vol. 119, January 1994, pp. 79-83.

Levin, J.O., Lindahl, R., and Andersson, K., "Monitoring of Parts-per-billion Levels of Formaldehyde using a Diffusive Sampler," APCA Journal, Vol. 39, No. 1, January 1989, pp. 44-47.

Levin, J.O., Lindahl, R., Andersson, K., and Hallgren, C., "High-Performance Liquid Chromatography Determination of Diethylamine in Air Using Diffusive Sampling Thiourea Formation," Chemosphere, Vol.18, Nos. 11-12, pp. 2121-2129.

Levin, J., Lindahl, R., and Andersson, K., "High-performance Liquid Chromatographic Determination of Formaldehyde in Air in the ppb and ppm Range Using Diffusive Sampling and Hydrazone Formation," National Institute of Occupational Health, Research Department in Umea, Analytical Chemistry Division, P.B. 6104, S-90006 Umea, Sweden Environmental Technical Letter 9, 1988, pp. 1423-1430.

Levin, J.O., Lindahl, R., and Andersson, K., "A Passive Sampler for Formaldehyde in Air Using 2, 4-Dinitrophenylhydrazine-coated Glass Fiber Filters," Environmental Science & Technology, Vol 20, No. 12, 1986, pp. 1273-1276.

Levin, J.O., Lindahl, R., Heeremans, C., and van Oosten, K., "Certification of Reference Materials Related to the Monitoring of Aldehydes in Air by Derivatization with 2,4-Dinitrophenylhydrazine," Analyst, Vol. 121, September 1996, pp. 1273-278.

Lindahl, R., Levin, J.O., "Laboratory Validation of a Diffusive Sampler for the Determination of Glutaraldehyde in Air," Journal of Chromatography A, 710, 1995, pp. 175-180.

Lindahl, R., Levin, J.O., and Jarvholm, B., "Self-assessment as a Method for Determination of Exposure to Formaldehyde," Indoor Air, Vol. 4, 1999, pp. 453-458.

Lindahl, R., Levin, J.O., and Martensson, M., "Validation of a Diffusive Sampler for the Determination of Acetaldehyde in Air," Analyst, Vol. 121, September 1996, pp. 1177-1181.

Pengelly, I., Groves, J. A., Levin, J.O., Lindahl, R., "An Investigation into the Differences in Composition of Formaldehyde Atmospheres Generated from Different Source Material and the Consequences for Diffusive Sampling," Applied Occupational Hygiene Vol. 40, No. 5, 1996, pp. 555-567.

OSHA Method 1007 Formaldehyde (Diffusive Samplers), May 2005.

Note:UMEX was developed in collaboration with:
Jan O. Levin
Arbetslivsinstitutet
National Institute for Working Life
Umea, Sweden

This page was last modified March 15, 2010
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