【简答题】以正十八烷为内标分析燕麦敌样品中的燕麦敌含量。称取样品8.12g(W),加入内标物1.88g,测得燕麦敌及内标物的峰面积分别为68.0mm 2 和87.0mm 2 。已知燕麦敌以正十八烷为基准的相对响应值为0.417(S),求样品中燕麦敌的质量分数。(提示:题目给出相对响应值,计算时注意其与校正因子f i 的关系f i =1/S)
【判断题】Purpose Statement means the overarching goal of a speech; for instance, to inform,to persuade, to inspire, to celebrate, to mourn, or to entertain