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- E-ISSN 2288-8985
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Survey of nitroso-compounds level derived from additives in metal-working fluids
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2007, v.20 no.4, pp.268-278
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(2007). Survey of nitroso-compounds level derived from additives in metal-working fluids. Analytical Science and Technology, 20(4), 268-278.
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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 (<TEX>$20{\mu}g/mL$</TEX>).N-nitrosodiethanolamine(NDELA) was detected in 18 samples among 21 diluted solution. Seven (33%) samples showed over German recommendation level (<TEX>$5{\mu}g/mL$</TEX>). The concentration of NDELA was correlated with nitrite ion (<TEX>$R^2
- keywords
- Metal-working fluid, nitrite, N-nitrosodiethanolamine(NDELA) ethanolamine, carcinogen
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