dt = Data Table("splitsummary2");
// Get values as matrix and use the loc command to get the locations where compound is equal to "Vehicle0mg/kg". (In my table it appears 3 times). These locations you can use as indices to gt the value(s) you need for further analysis.
m = Column( dt, "AUC dark phase absolute (ml/kg)" ) <<
Get as matrix();
c = Column( dt, "Compound" ) <<Get as Matrix();
col_dark = m[loc(c,"Vehicle0mg/kg")];
This should get you the value you need. [23330.7291666667]