US scientists have developed a non-destructive method to detect possible forged documents.The technique,developed by Graham Cooks at Pur due University,Indiana,and his colleagues,combines 2D molecular imaging with ambient mass spectrometry(MS). Current methods for document analysis regularly use a chromatographic step before MS analysis.This means that parts of the document need to be cut up,and requires time-consuming solvent extr action steps.
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机译：美国科学家已经开发出一种非破坏性的方法来检测可能的伪造文件。该技术是由印第安纳州Pur Due University的Graham Cooks和他的同事开发的，将2D分子成像与环境质谱（MS）相结合。当前的文档分析方法通常在MS分析之前使用色谱步骤。这意味着文档的一部分需要切割，并且需要耗时的溶剂萃取步骤。
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