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。

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The principle of electrospray ionization-mass spectrometry (ESI-MS) and matrix assisted laser desorption ionization-mass spectrometry (MALDI-MS) is described.

概述了电喷雾电离质谱(esi - MS)、基质辅助激光解析电离质谱(MALDI - MS)的原理。

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Using a combination of modern physics tools--including three-dimensional, high-resolution X-ray, radiocarbon dating with accelerator mass spectrometry, and infrared spectroscopy--the researchers analysed the tooth to determine the age and composition of a resinous filling detected inside.

UNESCO: Basic Sciences

The most likely alternatives, butter and pig fat, were ruled out using a technique called isotope-ratio mass spectrometry, which measures the molecular weights of the chemicals in a sample.

ECONOMIST: The Romans, too, had sophisticated cosmetics

The compounds in their breath were analysed using a technique called secondary electrospray ionisation mass spectrometry (SESI-MS), which is capable of detecting extremely small elements of the chemicals present in their breath.

BBC: Lung infection identified using 'breath-print'