allowable exposure
2.[Conclusion] There exists a relationship expressed as TWA theor=μe σ 2/2,between EIC and TWA in most workplaces,which may be helpful in converting EIC into TWA concentrations and in setting the TWA value while working out a dust occupational exposure limit in China and also determining how much should be allowable for TWA excursion limit internationally.
3.Methods Workers in plastic industry were divided based on their exposure level,85 exposed to VC in workshop at a concentration lower than maximal allowable concentration (MAC) set in the national standards as a low-level group,75 exposed to VC higher than MAC as high level group,and 100 unexposed as healthy control group. DNA damage in lymphocytes was determined with single cell microgel electrophoresis and micronucleus test.
