Agilent GC/MS Standard Spectra Tune Report的Gain Factor是什么意思啊？

放大倍数的意思

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所以看Gain factor也可以判断EM目前状况啰?

应助达人

Gain Factor
EM Gain Factor adjusts the signal sensitivity of the detector. EM Gain Factors have the advantage of not changing as the multiplier ages. Therefore using Gain Factors produces much higher signal reproducibility for any instrument and better consistency between instruments.

A Gain Factor of 1.0 represents a signal multiplication (gain) of 100,000 by the detector. Higher Gain Factors raise the signal sensitivity but can also decrease the life of the EM. The Gain Factor settings range from 0.25 to 25 representing signal gains from 25,000 to 2,500,000.

Ionization Mode
Recommended Gain Factor ranges
Settings for Trace Analysis

Electron Impact Ionization
.75 to 15
15

Positive Chemical Ionization
.5 to 2
2

Negative Chemical Ionization
1 to 14
14


The relationship between Gain Factor and EM Voltage is stored in the tune file and updated during tuning. This relationship can also be manually executed by selecting Update EMV Gain Coefficients under Parameters in Tune view.

A detailed discussion is presented in the technical overview note titled Enhancements to Gain Normalized Control of EM Voltage (part number 5989-7654EN) available at the Agilent website under Literature.

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