General gas analysis with a mass spectrometer is based on linear regression *** generally involves the measurements of ion intensities and the manipulations of the fragmentation matrix such as matrix inversion and tra...
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General gas analysis with a mass spectrometer is based on linear regression *** generally involves the measurements of ion intensities and the manipulations of the fragmentation matrix such as matrix inversion and transpose *** in simple cases,where no ion interference exists and the fragmentation matrix of the analysis is a diagonal matrix,the linear regression analysis reduces to just ion intensity ratio *** these occasions small and low cost RGAs have been widely used with ***,if this simple method of intensity ratio measurements,instead of the full linear regression analysis,is applied to the cases where ion interferences are not negligible,severe errors will be introduced in the concentration *** control applications with mass spectrometers often involve gas streams with substantial ion interferences between the detection *** precision is required on the control parameters for the process feedback control loop,therefore the mass spectrometer must be precisely calibrated and have a perfect linearity over a wide range of *** control parameters are generally calculated through the measured component concentrations and are required to update with fast *** these online process control applications,the sensitivity,precision,and linearity of the instrument become critical performance parameters In this article,the linear regression analysis for general gas analysis will be briefly described and the importance of the instrument sensitivity,measurement precision,data repeatability and linearity of the mass spectrometer instrument will be demonstrated through some examples from the process control applications.
Hummingbird Business Introduction Hummingbird Business Introduction Over 50 years deyeloping Gas Sensing Technologies. Responsible for many market leeding innovations. Over 25 years operating within the OEM market.
Hummingbird Business Introduction Hummingbird Business Introduction Over 50 years deyeloping Gas Sensing Technologies. Responsible for many market leeding innovations. Over 25 years operating within the OEM market.
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