Accession Number:

ADA355713

Title:

Assessment of Exposure to Sensitizing Rosin-derived Compounds from Electronics Soldering

Descriptive Note:

Final rept. 1 Jun-30 Apr 98

Corporate Author:

BRIGHAM YOUNG UNIV PROVO UT DEPT OF CHEMISTRY AND BIOCHEMISTRY

Personal Author(s):

• Bowerbank, Christopher R.
• Lee, Milton L.

Report Date:

1998-11-06

Pagination or Media Count:

77.0

Abstract:

Exposure potential for rosin-derived compounds, including volatile and semivolatile organic compounds produced during electronics soldering operations using rosin-based fluxes and rosin core solders, was investigated. A reaction system was constructed for trapping emission products. Particulate matter was collected on filters, and volatile organic compounds were collected on sorbent tube media for analysis by gas chromatographymass spectrometry GCMS. Comparisons were made between reaction system samples and actual breathing zone samples collected during soldering operations. Other work included 1 A protein conjugationhaptenation mechanism for 7-oxodehydroabietic acid, an oxidized resin acid compound present in aerosol produced by heating rosin flux, 2 Identification of low molecular weight aldehydes in soldering emissions using gas chromatographymass spectrometery GCMS, 3 In vitro studies of resin acid metabolism to identify mammalian metabolites produced from dehydroabietic acid, and 4 A rapid method for analyzing headspace sampling of aldehydes using solvating gas chromatography SGC. This project provided information regarding the specific compounds generated during rosin heating in electronic soldering applications. A possible biological mechanism was shown for sensitization to a resin acid present in aerosol produced during heating rosin flux. The work described may prove useful in producing an exposure standard for contaminant sampling during electronics soldering operations.

Descriptors:

• *FLUX(RATE)
• *ORGANIC COMPOUNDS
• *PARTICULATES
• *SOLDERING
• *SENSITIZING
• *ROSIN
• ELECTRONICS
• EMISSION
• AEROSOLS
• EXPOSURE(GENERAL)
• POLYMERS
• MOLECULAR WEIGHT
• IN VITRO ANALYSIS
• OXIDATION
• ABSORBERS(MATERIALS)
• HEATING
• SAMPLING
• LIGHTWEIGHT
• CONTAMINANTS
• FILTERS
• RESPIRATION
• GAS CHROMATOGRAPHY
• ALDEHYDES
• METABOLITES
• MASS SPECTROMETRY
• MICROMINIATURIZATION
• PROTEINS(CONJUGATED)

Subject Categories:

• Organic Chemistry
• Electrical and Electronic Equipment
• Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE