Sampling for formaldehyde in workplace and ambient air environments--additional laboratory validation and field verification of a passive air monitoring device compared with conventional sampling methods.
Results of three extensive plant field tests using both area and personal sampling and involving 51 sets of comparison samples show the Du Pont Pro-Tek Formaldehyde Badge to have excellent correlation with three commonly used formaldehyde monitoring methods. In addition, comprehensive laboratory validation tests are reported which confirm an overall accuracy of +/- 9.6 to +/- 11.6% for the badge over an exposure range of 0.12-6.8 ppm. Laboratory test data are also included showing that the badge: (1) meets NIOSH and OSHA accuracy requirements of less than or equal to +/- 25% down to 1.6 ppm-hours (200 ppb) for an 8-hour TWA exposure; (2) is capable of accurately sampling for 15-minute exposures; and (3) is not affected by pressure or relative humidity variations.