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Development of a field method for measuring manganese in welding fume.

Authors
Marcy-AD; Drake-PL
Source
J Environ Monit 2007 Nov; 9 (11):1199-1204
NIOSHTIC No.
20032929
Abstract
Workers who perform routine welding tasks are potentially exposed to fume that may contain manganese. Manganese may cause respiratory problems and is implicated in causing the occurrence of Parkinson-like symptoms. In this study, a field colorimetric method for extracting and measuring manganese in welding fume was developed. The method uses ultrasonic extraction with an acidic hydrogen peroxide solution to extract welding fume collected on polyvinyl chloride filters. Commercially available pre-packaged reagents are used to produce a colored solution, created by a reaction of manganese(II) with 1-(2-pyridylazo)-2-naphthol. Absorbance measurements are then made using a portable spectrophotometer. The method detection limit and limit of quantification (LOQ) were 5.2 g filter(-1) and 17 g filter(-1), respectively, with a dynamic range up to 400 g filter(-1). When the results are above the LOQ for the colorimetric method, the manganese masses are equivalent to those measured by the International Organization for Standardization Method 15202-2, which employs a strong acid digestion and analysis using inductively coupled plasma-optical emission spectrometry.
Keywords
Risk-analysis; Construction-industry; Construction-workers; Welders; Welding; Respiratory-irritants; Respiratory-system-disorders; Fumes; Quantitative-analysis; Breathing-atmospheres; Work-environment; Environmental-exposure; Chemical-reactions
Contact
Pamela L. Drake, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Spokane Research Laboratory, 315 E. Montgomery Ave, Spokane, WA 99207
CODEN
JEMOFW
CAS No.
7439-95-4
Publication Date
20071101
Document Type
Journal Article
Email Address
pdrake@cdc.gov
Fiscal Year
2008
NTIS Accession No.
NTIS Price
Issue of Publication
11
ISSN
1464-0325
NIOSH Division
SRL
Source Name
Journal of Environmental Monitoring
State
WA
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