The fibres were replaced at regular intervals over the course of seven days and taken away for analysis by a device called a gas chromatograph-mass spectrometer.
在七天的实验里，每隔一定时间就要更换一次纤维，然后用一种叫做气相色谱质谱联用仪的装置提取以供分析。
Quadrupole mass spectrometer can be used in measuring pressure of dividing and analysis composition of material.
四极质谱计在真空技术中可用来测量分压强，从事物质成分的分析。
The analysis method USES a simplified version of a mass spectrometer, a tool that can be used to separate and identify molecules in compounds.
这种方法运用简化的质谱仪来分析样本。质谱仪可用于分离和识别化合物中的分子。
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