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Document ID (ISN)101590
CIS number 03-927
ISSN - Serial title 1542-8117 - AIHA Journal
Year 2003
Convention or series no.
Author(s) Linnainmaa M., Kiviranta H., Laitinen J., Laitinen S.
Title Control of workers' exposure to airborne endotoxins and formaldehyde during use of metalworking fluids
Bibliographic information July-Aug. 2003, Vol.64, No.4, p.496-500. Illus. 25 ref.
Abstract The study evaluated workers' exposure to bacteria, endotoxins and formaldehyde during the use of metalworking fluids (MWFs). Air sampling was used to estimate workers' exposure to endotoxins at workplaces near enclosed and open machines. Concentrations of triazine used as a biocide in MWF and formaldehyde in the air were measured. Recirculating local exhaust ventilation systems were also tested. The endotoxin and bacteria concentrations in MWF rapidly increased when the biocide levels decreased below 500ppm. Airborne concentrations of endotoxins were substantially lower near enclosed machines than near open ones. Concentrations of airborne formaldehyde were below the Finnish occupational exposure limit. The results showed that the triazine levels in MWF should continuously be kept high enough (>500ppm) to prevent workers' exposure to endotoxins and bacteria. Overdosing with triazine, however, should be avoided, so that the levels of airborne formaldehyde remain low.
Descriptors (primary) formaldehyde; bacteria; exposure tests; cutting fluids; metalworking industry; bacterial toxins
Descriptors (secondary) threshold limit values; personal sampling; triazine; determination in air; exhaust ventilation; exposure evaluation; biocides
Document type D - Periodical articles
Country / State or ProvinceFinland
Subject(s) Metal production and metalworking
Broad subject area(s) Biological hazards
Browse category(ies) Biological monitoring
Metalworking industry