Exposure potential peak

The relative nragnitude of potential peak exposures fiom sporadic consumption of whale meat is possible to estimate. Assume that a pregnant woman consumes whale meals of 113 g each on 3 consecutive days when whale meat is available, and that her maternal-hair Hg concentration is 4.5 ppm (the median matemal-hair concentration in the Faroese cohort (Grandjean et al. 

Figures 3 and 4, respectively, show thin-layer current-potential curves for polycrystalline Au and Ir in molar sulfuric acid before and after exposure to a 2 mM HQ solution. For smooth Au, no changes in the voltammetric curves are seen. In comparison, a prominent anodic oxidation peak is observed for Ir after pretreatment with HQ. These observations, which indicate that Ir is reactive towards HQ but Au is not, are consistent with what is known from the literature on homogeneous organometallic chemistry (21) Ir and Pt complexes are reactive towards a variety of organic compounds, whereas Au is inert.

Exposure limits Potential occupational carcinogen. NIOSH REL IDLH 150 ppm OSHA PEL TWA 100 ppm, ceiling 200 ppm, 5-min/3-h peak 300 ppm ACGIH TLV TWA 25 ppm, STEL 100 ppm (adopted). 

No information was located regarding methods to reduce peak absorption following exposure to potentially toxic levels of chlorine dioxide or chlorite. 

The MAK values are mean concentrations over the complete time of exposure. Allowable concentration peaks are restricted to limited values of concentration highs, period of exposure and frequency of these events per shift. In rating the hazardous potential of chemical exposure, animal experiments arc used and in addition compared with those of known human exposure, thus a high safety standard is guarantied. 

---