The deleterious ingredients in gas emission of sculpturing organic glass were studied,using gas chromatography-mass spectrometry coupled with 3-step preconcentrator.
研究了3阶段预浓缩气相色谱-质谱法检测有机玻璃在程中排放的有害气体的组成。
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Increasingly today, archaeologists are circumventing this problem by a new technique termed accelerator mass spectrometry, which permits radiocarbon dating of tiny samples and thus lets one directly date a single small seed, small bone, or other food residue.
如今,考古学家越来越多地通过一种称为加速器法的新技术来规避这个问题,该技术可以对微小样品进行放射性碳测年,从而使人们可以直接测定单个小种子、小骨头或其他食物残渣的年代。