可爱宁静的海滩 a lovely quiet beach
The linear ranges of nicotine and cotinine were 4.3 ng /ml～1.0mg/ml and 10ng/ml～2.0mg/ml, respectively. The correlation coefficients were more than 0.9996.
尼古丁及可的宁的线性范围分别为：4.3ng／ml～1.0mg／ml和10ng／ml～2.0mg／ml，标准曲线的相关系数均为0.9996；对于0.1g发样，尼古丁和可的宁的检出限分别为0.013μg／g和0.030μg／g。
参考来源 - 人发中尼古丁及其代谢产物可的宁和染发剂的测定方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
这一项目中还包括尿检，因此研究人员还可以测量尿中尼古丁及其代谢物的含量（如可铁宁），这样会得到有关他们处于烟雾中时的情况的比较客观的记录。
The subjects also provided urine so the researchers could measure the amount of nicotine and its metabolites, like cotinine, for an objective record of their exposure to cigarette smoke.
研究表明，吸一根含薄荷醇的烟比吸一根一般的烟所摄取的一氧化碳，尼古丁和可替宁量更多。
Research has shown that menthol cigarettes may provide higher levels of carbon monoxide, nicotine and cotinine per cigarette smoked than regular cigarettes.
40位未检出尼古丁和可替宁的志愿者被归类为“非烟民”；
The 40 people with undetectable levels of nicotine and cotinine were classified as nonsmokers;
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