Description
Assay Technology’s 581 Aldehyde Monitor is our fastest sampling rate, lowest reporting limit aldehyde badge.
Glutaraldehyde and ortho-Phthalaldehyde STEL
The badge was designed for Glutaraldehyde and Ortho-Phthalaldehyde STEL monitoring.
| Chemical | 15 minute Reporting Limit, mg/m3 | 15 minute Reporting Limit, ppm |
| Glutaraldehyde | 0.0084 | 0.0021 |
| ortho-Phthalaldehyde | 0.0093 | 0.0017 |
ACGIH Ceiling for OPA
Using the 581 badge, the 15 minute reporting limit for OPA is 0.0093 mg/m3. The ACGIH Ceiling for OPA is well below that at 0.0006 mg/m3. To reach the ACGIH limit, monitor for at least 260 minutes and the reporting limit is 0.00054 mg/m3.
Formaldehyde
The 581 monitor can be used formaldehyde and the reporting limit will be lower than the 571 badge. However, the 571 badge is still the badge Assay Technology recommends for formaldehyde monitoring because the cost is less.
However, customers who plan to use the NIOSH REL-TWA, NIOSH Ceiling, or other regulatory limits significantly lower than OSHA’s to evaluate their formaldehyde results should use the 581 badge, not the 571. For example, the NIOSH REL-TWA is 0.016 ppm, which is over 46 times lower than the OSHA PEL of 0.75 ppm. Because of this, the faster-sampling 581 with an 8-hour reporting limit of 0.0014 ppm (and a 15-minute reporting limit of 0.044 ppm) is preferred.
This badge collects the following:
- Formaldehyde (formalin)
- Glutaraldehyde (Cidex)
- o-Phthalaldehyde (Cidex OPA)
- Acetaldehyde
- Benzaldehyde
- Butyraldehyde
- Crotonaldehyde
- Hexaldehyde
- Propionaldehyde
- Tolualdehyde
- Valeraldehyde
Special Notes
o-Phthalaldehyde (OPA) cannot be tested with other aldehydes on the same sampler.
