Peak Detection

Table 3-3 Peak Processing Parameters (Spectrum Data Only) (Continued)

Parameter

Description

 

 

 

 

 

 

Charge State Determination (Spectrum only)

 

 

 

 

 

 

Maximum Charge

Determines the peak spacing evaluated for the presence of

 

 

State

isotope peaks. The expected peak spacing is determined by

 

 

 

the Max Charge State plus or minus a tolerance value. The

 

 

 

tolerance is calculated as (proton mass/charge state) × 15%.

 

 

 

For example, with a Max Charge State of 3, the software

 

 

 

checks for peaks that are 0.33 m/z apart, with a fixed

 

 

 

tolerance of 0.05 m/z, where proton mass equals

 

 

 

1.007276456. Maximum Charge State is 6 for Mariner data

 

 

 

and 1 for Voyager data.

 

 

 

 

 

 

 

 

Maximum Isotopes #

Specifies the maximum number of peaks included in an

 

 

 

isotope cluster.

 

3

 

NOTE: Setting this value too low can result in peaks not

 

 

 

 

 

being included in the appropriate isotope cluster. For more

 

 

 

information, see “Max Isotope # set too low” on page 3-35.

 

 

 

 

 

 

Minimum and

Specifies the intensity range that a peak must fall within

 

 

Maximum Intensity%

(relative to the previously evaluated higher mass peak) to be

 

 

 

included in the current isotope cluster.

 

 

 

 

 

 

Data Explorer™ Software User’s Guide

3-27