digital.library.unt.edu/67531/metadc674098/m2/1/high_res_d/acree_0258.pdfhexane and methanol from...
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digital.library.unt.edu/67531/metadc674098/m2/1/high_res_d/acree_0258.pdfhexane and methanol from the test tube walls, and it was difficult to measure accurately the fluorescence emis-