fig6

Figure 6. The threshold odor number, on a logarithmic scale, indicates whcre an odor first was noticed by cach panel member. Triangles indicate a anel member noticing an odor in the most diluted sample, and diamonds indicate no odor in the least diluted sample. Dots indicate a panel member noticing an odor in any other bottle. In theIst round, a dilution factor of 2 was used, and in the 2nd and the 3rd round, a dilution factor of 2.5 was used. One cur per fuel type for better visual separation. WAF: Water-accommodated fraction.