研究人员从17个城市收集到230张纸币样本，并使用水和超声波提取方法，再加上气相色谱分析-质谱法对样本进行测试。
The researchers used water and an ultrasonic extraction process, followed by gas chromatography-mass spectrometry to quantify the amount of cocaine in more than 230 bills collected in 17 cities.
建立了固相萃取-气相色谱-质谱法（SPE-GC/MS）同时测定动物尿样中的莱克多巴胺和克伦特罗的方法。
A new solid phase extraction-gas chromatography-mass spectrometry(SPE-GC/MS) method for simultaneous determination of ractopamine and clenbuterol in animal urine was reported.
本文采用气相色谱-质谱法分析检测三乙酸甘油酯的酯含量，并对照用经典方法检测的结果，探索用气相色谱-质谱法检测三乙酸甘油酯的酯含量的可行性和实用性。
Comparing with the testing results of the classic methods, the feasibility and practicability of analysis of ester in triacetin by using GC-MS is explored in this paper.
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