The retarding force of air friction on a moving object. 空气中运动的物体所受到的使其减速的力。
Octadecane has good resolving power for ethylbenzene and p-xylene, but it reverts the elution order of o-and m-xylene and its retarding force for o-xylene is not strong. It has been found that the elution order of solutes varies with the pH value of mobile phase. 十八烷可以很好地分离乙苯和对二甲苯,但邻二甲苯在间二甲苯以后流出,而且它对于邻二甲苯的滞留作用不强。研究表明,不同的pH,溶质的流出次序发生改变。