Oxine-Copper (GOLF-413 vs. ODS)
Oxine-copper easily makes coordination complex with other metals. When analyzed by an ODS column, the presence of metal-impurity in silica may cause adsorption and/or tailing. The packed gel used in golf course herbicides analysis column, RSpak 
GOLF-413 is a polymer base. The column does not contain metals thus prevents adsorption of oxine-copper.

  Sample : 
Oxine-Cu, 20micro-L  
   
    |  
       
  
     | 
     
       GOLF-413 
     | 
     
       ODS 
     | 
  
   
    |  
       fas 
     | 
     
       1.152 
     | 
     
       2.042 
     | 
  
Columns      : Shodex RSpak GOLF-413,ODS(other manufacturer) (4.6mmID*150mm each)
Eluent       : 20mM H3PO4 aq./CH3CN=95/5
Flow rate    : 1.0mL/min
Detector     : UV(254nm)
Column temp. : 40deg-C