请您在帮我一下Given DBP with lgKow = 4.45, it is more apt to soil-air and soil-water exchanges, while DEHP is adsorbed easily by soil organic matter owing its higher lgKow (7.50). 这句话是什么意思呢
还有这句 Each extract was then cleaned and fractionated on a 20×1 cm ( i.d ) 1:2 alumina/silica gel glass column packed, from the bottom to top, with neutral silica gel (12 cm), neutral alumina (6 cm), and anhydrous sodium sulfate (1 cm).
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