Patent ID: 6147344
Filing Date: 2000-11-14
Classification: H01J

Abstract:
A method for analyzing mass spectrometer data, comprising the steps of:a) performing a mass spectrometer operation on a control sample, said operation producing a first plurality of output values, each of said first plurality having an associated m/z ratio value;b) performing a mass spectrometer operation on a material to be analyzed, said operation producing a second plurality of output values, each of said second plurality having an associated m/z ratio value;c) selecting a first expected m/z ratio from a predetermined library of calculated mass spectrometer output spectrums and subtracting the value of said first plurality at said first expected output m/z ratio from the value of said second plurality at said first expected m/z ratio, said subtracting producing a difference value at said first expected m/z ratio;d) as a function of said difference value, generating a flag signal containing said first expected m/z ratio and said associated value of said second plurality if said difference value exceeds zero by a predetermined value;e) storing said flag signal in a memory location; andf) repeating steps c) to e) with each individual one of all remaining said expected m/z ratios in said predetermined library of calculated mass spectrometer output spectrums.