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

<table>IR absorbance versus concentration (ppm).</table>

Applied and Environmental Soil Science

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Figure 1

Figure 1: Quantitative Analysis of Total Petroleum Hydrocarbons  in Soils: Comparison between Reflectance Spectroscopy and Solvent Extraction by 3 Certified Laboratories 

Figure 1 | Quantitative Analysis of Total Petroleum Hydrocarbons  in Soils: Comparison between Reflectance Spectroscopy and Solvent Extraction by 3 Certified Laboratories 