7月25号 新问题 •Why does the library search results report the same compound more than once?
解答 The NIST, WILEY, and other libraries were not produced by Agilent. They contain spectra produced using magnetic field type equipment and by MS from various different manufacturers. As the library may contain a number of different measurements for the same compound, the compound may be displayed more than once in the results. In the extended data analysis screen, open the [Spectra] menu and click [Edit Search Strategy] to open the [Search Strategy] dialog box. Selecting the [Delete duplications and CAS number] checkbox will prevent the same compound from appearing more than once.
新问题之二：After replacing column for SIM analysis why are no peaks identified? 更换柱子之后，SIM模式下扫描检测不到任何组分？
解答：SIM analysis typically performs grouping and changes the ions captured in each time band. Changing the column usually causes the peak retention times to change. If the retention time for a particular compound's peak changes the peak will not appear if the ions required to capture that compound's peak are not set. In this situation, perform another scan measurement, reconfigure the SIM data acquisition conditions based on this data, and then perform the SIM measurement. You can also obtain the data by performing synchronous SIM/Scan data acquisition.
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