Scientists had to wait until the development of a technique called gas chromatography/mass spectrometry to identify traces of methoxypyrazines.
科学家们只得一直等到叫做气相色谱或是质谱的技术的出现，才得以识别出痕量的甲氧基吡嗪。
To do this, the oils were broken into their component parts and analysed using gas chromatography and mass spectrometry.
实验过程中，他们将精油分散成各自的组成成分，用气体色谱分析法和质谱分析法进行分析。
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.
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 human body odor can also been analysis by Electronics nose and gas chromatography mass spectrometry(GC/MS).
电子鼻、气相色谱质谱等化学分析仪器也可用于人体气味的检测分析。
Using gas chromatography and mass spectrometry, researchers have, over the years, identified more than 3,000 compounds that are regularly exhaled, excreted or exuded from the body.
这些年来，凭借着气相色谱分析技术和质谱分析技术，科学家已经鉴定出来了能有规律的从人体排出或者挥发出的超过3,000种化合物。
Analytical advantages of high sensitivity, high selectivity and rapid response time make gas chromatography-toroidal ion trap mass spectrometry (GC-TMS) a preferred detection technique.
高灵敏度、高选择性、快速响应时间等分析优点使得气相色谱-离子阱质谱联用技术(GC -TMS)成为一种首选的检测技术。
The analytical method for identification of the toxicosis in blood was established by gas chromatography mass spectrometry(GC/MS) based on the practical clinical case.
基于临床实际病例，建立了采用气相色谱-质谱（GC/MS）技术即时鉴定中毒病人血液中有毒物质的临床分析方法。
With the instrument blowing and trapping to concentrate and sample and external standards, the gasoline in soil is determined quantificationally by gas Chromatography-Mass Spectrometry.
对土壤中的汽油，采用外标法，经吹扫捕吸仪浓缩后，用气相色谱-质谱法分析定量。
The method utilized purge-and-trap to concentrate benzene in beverages, gas chromatography and mass spectrometry(GC-MS) was used to determine benzene .
建立了饮料中痕量苯的检测方法，采用吹扫捕集浓缩饮料中的苯，使用气相色谱质谱检测器进行定性定量测定。
He is using gas chromatography, mass spectrometry and thermal desorption (GCMS-TD) technology to test the concentrations of VOCs in human breath.
他正在利用气相色谱-质谱分析-热脱附(GCMS - TD)技术来测试人体呼气中的VOC浓度。
Chapter five: A simple and rapid method was used to determine the residues of 5 organophosphorus pesticides in Ginkgo Biloba leaves by gas chromatography-mass spectrometry (GC-MS).
第五章，采用高速匀浆法提取、柱层析法净化技术，成功建立了气相色谱质谱法同时测定银杏叶中5种有机磷农药残留量的方法。
The 12 of low polar components of Anabasis Aphylla L. were separated and identified by gas chromatography-mass spectrometry. They are naphthalene and azulene species.
采用气相色谱-质谱测定无叶假木贼低极性化学成分，分离鉴定了12个化合物，它们是萘类与类化合物。
The aromatic compounds of 28 representative China Oolong tea was studied by gas chromatography and mass spectrometry analysis.
采用气相色谱-质谱法对28个中国代表性乌龙茶芳香物质进行了研究。
Objective: to develop a method for analysis of alkylphenols in water by gas chromatography-mass spectrometry.
目的：建立测定水中烷基酚的气相色谱-质谱分析方法。
A method was developed for the simultaneous determining of Clenbuterol, Salbutamol, Terbutaline and Fenoterol residues in pork tissues using gas chromatography-mass spectrometry(GC-MS).
建立了用气相色谱-质谱同时检测猪肉中克伦特罗、沙丁胺醇、特布它林和非诺特罗残留量的方法。
The essential constituents from duke blueberry fruits were extracted by steam distillation method and the essential oil obtained was analyzed by gas chromatography-mass spectrometry.
用常规水蒸气蒸馏法提取杜克蓝莓果实中的挥发油，并用气相色谱-质谱法分析了其化学成分。
By means of gas chromatography, mass spectrometry and IR spectrum, the product was confirmed to be trimethyl borate.
结果利用气相色谱、色谱-质谱联用、红外光谱等分析表征手段，鉴定反应产物确实是硼酸三甲酯。
The polysaccharide structure has been determined by gas chromatogram and mass spectrometry. The important discussing the mechanism for determining polysaccharide structure by mass spectrometry.
用气相色谱-质谱法对多糖的结构进行了测定，并着重对质谱法测定多糖结构的机理进行了研究。
The citronella oil content of certain candle formulations was determined by headspace gas chromatography-mass spectrometry.
本文采用顶空进样气相色谱-质谱联用法测定蜡烛中香茅油的含量。
The components in the fluid catalytically cracked (FCC)gasoline were detected by capillary column gas chromatography-mass spectrometry(GC/MS).
应用毛细管柱气相色谱-质谱（GC/MS）分析催化裂化（FCC）汽油中的组成。
The volatile organic compounds (VOCs) produced in the laser-sculpture process of bicolor board were studied using cold trap condensation-gas chromatography-mass spectrometry.
研究了冷阱浓缩气相色谱-质谱法检测双色板在激光工艺雕刻过程产生的挥发性有机污染物的组成。
Volatile components from castrated and intact male rabbit meat were trapped using the improved nitrogen purge and trap(NPT)technique and were analysed by gas chromatography mass spectrometry(GC?MS).
应用改进的NPT技术提得去势公兔与正常公兔兔肉腥味物质，经气—质联谱比较分析，初步确定中级醛类是兔肉腥味物质的主导成分。
In this paper, the chemical constituents of geranium oil, collected from Rong Jiang, Guizhou, are studied by means of capillary gas chromatography-mass spectrometry.
采用毛细管气相色谱-质谱-计算机联用法研究了贵州榕江地区香叶油的化学成分。
In this paper, the pyrolytic compound of polyurethane acrylate oligomer was analyzed by pyrolytic gas chromatography-mass spectrometry and the pyrolytic mechanism was also discussed.
采用裂解色谱质谱技术对光固化聚氨酯丙烯酸酯齐聚物裂解产物进行了分析，并对裂解机理进行了讨论。
A method for rapid analysis of multiresidual pesticides in agricultural products by gas chromatograph-mass spectrometry(GC/MS) was introduced.
运用气相色谱质谱联用技术实现农产品中多种残留农药的快速检测。
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.
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 method was developed for determining residual clenbuterol and ractopamine in animal liver (tissues) using solid phase extraction (spe) with gas chromatography-mass spectrometry (GC-MS).
建立了同时测定动物肝组织中盐酸克伦·特罗和盐酸莱克多巴胺残留量的固相萃取-气相色谱-质谱分析方法。
The primary impurities in butachlor technical were quantified by gas chromatography-mass spectrometry (GC-MS).
利用气相色谱-质谱联用（GC-MS）技术对丁草胺原药中的主要杂质进行定性分析。
The primary impurities in butachlor technical were quantified by gas chromatography-mass spectrometry (GC-MS).
利用气相色谱-质谱联用（GC-MS）技术对丁草胺原药中的主要杂质进行定性分析。
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