Elution of 17α 25-Norhopanes and Triaromatic Steroids from Weathered Soils by Mixed Triton X-100/Na<sub>2</sub>SiO<sub>3</sub> Surfactant Solution

JI Guo-dong, ZHOU Guo-hui

Chemical Research in Chinese Universities . 2012, (3): 419 -423 .