Quantitative Analysis of Total Petroleum Hydrocarbons  in Soils: Comparison between Reflectance Spectroscopy and Solvent Extraction by 3 Certified Laboratories

<table>Contaminant IR absorbance versus 418.1 EPA reference IR absorbance.</table>

Applied and Environmental Soil Science

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Figure 2

Figure 2: Quantitative Analysis of Total Petroleum Hydrocarbons  in Soils: Comparison between Reflectance Spectroscopy and Solvent Extraction by 3 Certified Laboratories 

Figure 2 | Quantitative Analysis of Total Petroleum Hydrocarbons  in Soils: Comparison between Reflectance Spectroscopy and Solvent Extraction by 3 Certified Laboratories 