主题：【分享】刚翻译怪侠一把刀在“为什么同样的方法和样品5973比5975的峰高和峰面积要大？？？”最后两帖

刚翻译“怪侠一把刀”在“为什么同样的方法和样品5973比5975的峰高和峰面积要大？？？”一帖中的最后两帖，可一回复，原帖已被收藏，无法跟了。本想算了，可一想，打了好一会字，扔了挺可惜的，就又重开了贴，放上来了。

试翻，请指正。

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.

为什么在谱图查询时相同的化合物会重复报告多次？
Nist 与 Wiley，及其它一些谱库并非由安捷伦公司制作，在这些谱库中不仅含有磁质谱采集，还有一些其它公司生产的质谱设备所采集的谱图，因此，对于同一种化合物，谱库中含有不同的谱图，因此谱图查询时，针对同一化合物会有相同结果多次出现。
为避免这种情况，可在扩展数据处理界面，打开 [Spectra] 菜单，点击 [Edit Search Strategy] （编辑搜索策略） 打开 [Search Strategy] （编辑搜索策略）对话框，选择 [Delete duplications and CAS number] （删除重复内容）

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.


典型的 SIM 分析模式是按分组来采集数据的，在不同的时间段内采集不同的离子碎片。换柱后会导致保留时间的飘移。如果某一特定化合物的保留时间改变了，同时用于该化合物的离子（的时间）未作相应变动，其峰就不会出现。针对这种情况，可重新全扫描一次，基于所得数据重新设定一下SIM的条件，然后再执行SIM模式。当然，你也可以利用同时 SIM/Scan 采集模式得到数据。