Steven Derek Pringle,Michael Raymond Morris,Stephen Smith,Michael McCullagh
申请号：
US14727941
公开号：
US09947524B2
申请日:
2015.06.02
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A method of detecting one or more compounds, chemicals or contaminants in a substrate by mass spectrometry is disclosed. A non-living substrate is analyzed by contacting the substrate with a diathermy knife. An electric current is applied to the diathermy knife such that the diathermy knife vaporizes a portion of the substrate. The vapor is aspirated via a sampling tube pumped by a venturi pump into a vacuum chamber of a mass spectrometer. Analyte molecules are aspirated into the vacuum chamber whereupon they impact a surface of the vacuum chamber and are ionized to form analyte ions which are then mass analyzed.
