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grass, field grass

Pb, biofuel trace elements

 value                  literature
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    0.22 ppm                 1
    0.33 ppm                 1
    0.78 ppm                 1
----------------------------------
count                        3
average                   0.44 ppm
standard deviation        0.24 ppm(55 %)

UNIVERSITY OF TECHNOLOGY VIENNA
Institute of Chemical Engineering, Fuel and Environmental Technology
Getreidemarkt 9/159
A-1060 Vienna
Austria