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http://dx.doi.org/10.5806/AST.2007.20.4.268

Survey of nitroso-compounds level derived from additives in metal-working fluids  

Yang, Jeong Sun (Center for Chemical Safety and Health Research, Korea Occupational Safety and Health Agency (KOSHA))
Choi, Jin Hee (Center for Chemical Safety and Health Research, Korea Occupational Safety and Health Agency (KOSHA))
Choi, Seong Bong (Center for Chemical Safety and Health Research, Korea Occupational Safety and Health Agency (KOSHA))
Lee, Jong Han (Center for Chemical Safety and Health Research, Korea Occupational Safety and Health Agency (KOSHA))
Publication Information
Analytical Science and Technology / v.20, no.4, 2007 , pp. 268-278 More about this Journal
Abstract
Nitrite which can be derived from water for dilution of metal working fluid can induce nitroso compounds which can be classified as carcinogen, if it co-exists with ethanolamines added for pH control in metal working fluid. The survey of nitrite, nitrate and nitroso-compounds level in 42 metal-working fluids collected from 17 factories was done by ion chromatography and gas chromatography with mass detector. Diluted metal working fluid showed higher level of nitrite and nitrate compared with raw fluid. Nitrite was detected in 11 (52%) samples among 21 diluted solution. Three (14%) samples showed over German recommendation level ($20{\mu}g/mL$).N-nitrosodiethanolamine(NDELA) was detected in 18 samples among 21 diluted solution. Seven (33%) samples showed over German recommendation level ($5{\mu}g/mL$). The concentration of NDELA was correlated with nitrite ion ($R^2=0.453$, n=19).
Keywords
Metal-working fluid; nitrite; N-nitrosodiethanolamine(NDELA) ethanolamine; carcinogen;
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