Patent ID: 11959898
Assignee: DH TECHNOLOGIES DEVELOPMENT PTE. LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 6:
7. The system of claim 6, wherein the standard deviation, σi+m, of the difference intensities calculated for retention time, i+m, is calculated according to, σ
    
     i
     +
     m
    
   
   =
   
    
     
      
       ∑
        
      
      
       j
       =
       1
      
      N
     
     ⁢
     
      1
      N
     
     ⁢
     
      
       (
       
        
         
          (
          
           
            a
            
             i
             +
             j
            
           
           
            a
            
             i
             +
             m
            
           
          
          )
         
         
          1
          2
         
        
        -
        
         
          (
          
           
            b
            
             i
             +
             j
            
           
           
            b
            
             i
             +
             m
            
           
          
          )
         
         
          1
          2
         
        
        -
        
         μ
         
          i
          +
          m
         
        
       
       )
      
      2
     
    
   
  
  ,
 

where N is the number of difference intensities calculated at each retention time, N is an odd number, m is the midpoint of N,, (
    
     
      a
      
       i
       +
       j
      
     
     
      a
      
       i
       +
       m
      
     
    
    )
   
   
    1
    2
   
  
  -
  
   
    (
    
     
      b
      
       i
       +
       j
      
     
     
      b
      
       i
       +
       m
      
     
    
    )
   
   
    1
    2
   
  
 

 for j=1 to N are the difference intensities calculated for retention time, i+m, and μi+m is the mean calculated according to, μ
   
    i
    +
    m
   
  
  =
  
   
    1
    N
   
   ⁢
   
    
     ∑
      
    
    
     j
     =
     1
    
    N
   
   ⁢
   
    
     (
     
      
       
        (
        
         
          a
          
           i
           +
           j
          
         
         
          a
          
           i
           +
           m
          
         
        
        )
       
       
        1
        2
       
      
      -
      
       
        (
        
         
          b
          
           i
           +
           j
          
         
         
          b
          
           i
           +
           m
          
         
        
        )
       
       
        1
        2
       
      
     
     )
    
    .