The convenient UMEx 100 Passive Sampler features sensitive method-validated chemistry for detection of low levels of formaldehyde. The single-use UMEx 100 contains a tape treated with 2,4-dinitrophenylhydrazine (DNPH) for reliable collection. Sampling rates are validated from 15 minutes to 24 hours or 7 days. Analysis is performed by high-performance liquid chromatography (HPLC).
Features
- Free media blank included
- Accuracy exceeds OSHA standards
- Highly selective 2,4-DNPH chemistry; easy analysis
- Accurate and reliable for formaldehyde collection
- Sample integrity is assured
- Validated by OSHA and Swedish Institute
- Documented formaldehyde uptake rates for 15-minute to 24-hour and 7-day samples
- Sampling rates available for other aldehydes
- Samples low ppb levels of formaldehyde
- 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
- 28.6 ml/min uptake rate enhances sensitivity for 15-minute, 8-hour, and 24-hour sampling
- Economical and easy to use
- No pump or training required
- Low-cost sampler
- Sample medium and blank in one unit
- Versatile sampler
| ‡ |
If sampling in an atmosphere containing
formalin, see Sampling
Formaldehyde from Formalin Using Passive Samplers (PDF) for
field study information. |
Specifications
Performance Profile
Sampling Rate for Formaldehyde |
28.6 ml/min with a RSD of 7.6% at wind velocity of 5 to 100 cm/sec for 15 minutes
to 24 hours
20.4 ml/min at wind velocities < 5 cm/sec for 1 to 7 days
See the More Information tab for
UMEx 100 sampling rates for other aldehydes. |
Detection Principle |
Formation of stable DNPH-hydrazone
in the presence of formaldehyde |
Validation Range |
0.06 to 3.0 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 mos from date of manufacture at < 39.2 F ([4 C]) |
Capacity |
29 µg/sample |
Analysis |
Solvent extraction and analysis by HPLC (high-performance liquid chromatography) 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 3 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 5 to 100 cm/sec |
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) |
| Note: |
If sampling in an atmosphere containing formalin, see Sampling
Formaldehyde from Formalin Using Passive Samplers for field study
information. |
Order
| Description |
Cat. No. |
UMEx 100 Passive Samplers, for Formaldehyde, Pk/10
UMEx 100 Passive Sampler, for formaldehyde, glutaraldehyde, and acetaldehyde; detection range from 5 ppb to 5 ppm; 15-minute to 24-hour samples and 7-day samples (sampling periods between 24 hours and 7 days have not been evaluated); single use only, pk/10 Limited shelf-life; freezer storage required
Meets OSHA Method 1007 specifications
If sampling in an atmosphere containing formalin, see www.skcinc.com/instructions/1795.pdf for field study information. |
500-100 |
UMEx 100 Passive Samplers, for Formaldehyde, pk/25
UMEx 100 Passive Sampler for Formaldehyde; detection range from 5 ppb to 5 ppm; 15-minute to 24-hour samples and 7-day samples (sampling periods between 24 hours and 7 days have not been evaluated); single use only, pk/25 Limited shelf-life; freezer storage required
Meets OSHA Method 1007 specifications
If sampling in an atmosphere containing formalin, see www.skcic.com/instructions/1795.pdf for field study information. |
500-100A |
Treated Tape, UMEx 100 Passive Sampler, for QC purposes only, pk/50
Treated Tape, UMEx 100 Passive Sampler, for QC purposes only; single use only, pk/50 |
P20084 |
