方法取ab - 8树脂分别经乙醇、丙酮处理前后的浸出液及经树脂吸附后的栀子洗脱液，以气相色谱法检测其中苯、甲苯、二甲苯、苯乙烯残留物的含量。
METHOD AB 8 resin was treated with alcohol and propanone and the extract was detected for the content of the residues of benzene, methylbenzene, xylene and styrene.
随土壤深度增加，土壤中原油残留物的含量呈波动递减趋势。
For Cultivated Loessial Soil, Dark Loessial Soil and Yellow-brown Soil, the advance distance decreased as silt content increased.
通过控制助焊剂中松香的含量，降低不挥发物的含量，减少残留物对元器件的腐蚀。
In order to reduce the corrosion of components caused by the residue, the amount of rosin was controlled.
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