Transcript Formaldehyde Monitoring

Formaldehyde Monitoring
Presented by
Michael D. Shaw
FORMALDEHYDE
HEALTH EFFECTS
CARCINOGENICITY
EPA—“B1”
ACGIH—“A2”
Probable human carcinogen
Suspected human carcinogen
WHO (IARC)—“Group 1”
Carcinogenic to humans
PHYSICAL SYMPTOMS
1-10 ppm—Eye irritation; lacrimation at 4 ppm
10-20 ppm—Coughing, heart palpitations, tight feeling in chest
50-100 ppm and above—Pulmonary edema, pneumonitis, death
Contact with skin (formalin or HCHO-containing resins)—Dermatitis
Minimum Fatal Dose Level —
Male single oral ingestion 517 mg/kg (DHHS)
OCCUPATIONAL EXPOSURE STANDARDS
ACGIH TLV®
0.3 ppm (Ceiling)
OSHA PEL
0.75 ppm (TWA)
2 ppm (Ceiling)
NIOSH REL
0.016 ppm (TWA)
0.1 ppm (Ceiling)
NIOSH ANALYTICAL METHODS
Method 2016 most sensitive
Silica gel/2,4-dinitrophenylhydrazine
Method 2541
Sorbent tube/2-hydroxymethyl piperidine
Method 3500
Impinger/chromotropic acid
(1,8-dihydroxynaphthalene-3,6-disulfonic acid)
INSTRUMENT METHODS—
PRACTICAL AND OTHERWISE
FTIR
Semi-automated wet chemical methods
Electrochemical (converted alcohol detectors)
Interscan purpose-designed HCHO sensor
INTERSCAN FORMALDEHYDE SENSOR
ADVANTAGES
Good sensitivity
0-500 parts-per-billion full scale measuring range available
Excellent specificity
Little effect from alcohols
Full interference info on gasdetection.com website
Quick response time
Rise time to 50%
5-10 seconds
Rise time to 90%
30-45 seconds
APPLICATIONS
HCHO ubiquitous in the workplace, however…
Biggest applications have been in the forest products industry
e.g., monitoring of emissions from manufactured wood products
Interscan’s HCHO sensor is the heart of Georgia Pacific’s
DYNAMIC MICROCHAMBER
Board compliance testing time reduced
from 2 weeks to less than an hour
MONITORING PRODUCTS
OFFERED BY
PORTABLE ANALYZER
CONTINUOUS MONITORING SYSTEM
SINGLE POINT APPLICATION
CONTINUOUS MONITORING SYSTEM
TWO POINT APPLICATION
CONTINUOUS MONITORING SYSTEM
MULTI-POINT (THREE OR MORE) APPLICATION
ARC-MAX®
DATA ACQUISITION, ARCHIVING,
AND REPORTING
ARC-MAX® MAIN SCREEN
ARC-MAX® SHIFT REPORT
ARC-MAX® TRENDING
ARC-MAX® ALARM LOG
For Survey Applications,
We Recommend Our Nomad Data Logger
16-bit resolution
Models available for
voltage and
4-20mA inputs
Self-contained units
also available for
temperature, humidity
and pH
Sampling rate adjustable—1 second to 10 hours in 1 second intervals
Storage capacity—522,240 readings
Excellent software included
Visualize your measurement session with an auto-scaling time history graph
Time history graph detail screen
Zoomed in on particular portion of the curve
Ability To View All Individual Data Points
CONCLUDING REMARKS
We've covered the health effects and
occupational standards for formaldehyde
We've looked at wet chemical and
instrumental methods for formaldehyde
We've seen a special application of Interscan's HCHO sensor
SPECIAL THANKS TO
PROFESSOR GEORGE BYRNS
and
the Prairie Section of the American Industrial Hygiene Association