发明名称 |
Time of flight mass spectrometer |
摘要 |
A method of determining the mass-to-charge ratios of ions in a sample is disclosed. The method includes determining a data acquisition time, where the data acquisition time is a predetermined fraction of the greatest time of flight. The method also includes providing ions from a continuous beam of a sample to a time-of-flight mass analyzer at pulse intervals having a duration equal to the predetermined fraction of the greatest flight time. The method also includes measuring a peak width and a flight time value for each of the ion species in the sample after summing the data acquired during several pulse intervals and correcting the measured flight time values according to a correlation of measured peak width values with calibration data of peak width versus flight time. |
申请公布号 |
US8803083(B2) |
申请公布日期 |
2014.08.12 |
申请号 |
US201213683077 |
申请日期 |
2012.11.21 |
申请人 |
Agilent Technologies, Inc. |
发明人 |
Goldberg Noah |
分类号 |
H01J49/26 |
主分类号 |
H01J49/26 |
代理机构 |
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代理人 |
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主权项 |
1. A method of determining the mass-to-charge ratios of ions in a sample, the method comprising:
providing a calibration sample comprising ions of different mass-to-charge ratios to a time-of-flight mass analyzer and acquiring data until an ion with a greatest time of flight is incident on an ion detector; determining a peak width for each ion species of the calibration sample after summing several time-of-flight measurements of the calibration sample to provide calibration data of peak width versus flight time; determining a data acquisition time, the data acquisition time being a predetermined fraction of the greatest time of flight; providing ions from a continuous beam of a sample to a time-of-flight mass analyzer at pulse intervals having a duration equal to the predetermined fraction of the greatest flight time; measuring a peak width and a flight time value for each of the ion species in the sample after summing the data acquired during several pulse intervals; correcting the measured flight time values according to a correlation of measured peak width values with the calibration data of peak width versus flight time; and converting the corrected flight time values into the mass-to-charge ratios. |
地址 |
Santa Clara CA US |