Formaldehyde Monitoring

1
Formaldehyde Monitoring
Presented by
Michael D. Shaw
2
FORMALDEHYDE
3
HEALTH EFFECTS
4
CARCINOGENICITY
EPAB1 Probable human carcinogen
ACGIHA2 Suspected human carcinogen
WHO (IARC)Group 1 Carcinogenic to humans
5
PHYSICAL SYMPTOMS
1-10 ppmEye irritation lacrimation at 4 ppm
10-20 ppmCoughing, heart palpitations, tight
feeling in chest
50-100 ppm and abovePulmonary edema,
pneumonitis, death
Contact with skin (formalin or HCHO-containing
resins)Dermatitis
Minimum Fatal Dose Level
Male single oral ingestion 517 mg/kg (DHHS)
6
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)
7
NIOSH ANALYTICAL METHODS
8
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)
9
INSTRUMENT METHODS PRACTICAL AND OTHERWISE
FTIR
Semi-automated wet chemical methods
Electrochemical (converted alcohol detectors)
Interscan purpose-designed HCHO sensor
10
INTERSCAN FORMALDEHYDE SENSOR
11
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
12
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
13
Interscans HCHO sensor is the heart of Georgia
Pacifics
DYNAMIC MICROCHAMBER
Board compliance testing time reduced from 2
weeks to less than an hour
14
(No Transcript)
15
(No Transcript)