The horizontal system

 

has a number of advantages over the vertical ones when ultrathin gels polymerized on support films are used:

 

• 1.  simpler handling

• 2.  easy use of readymade gels

• 3.  buffer strips instead of large buffer volumes

• 4.  good cooling efficiency

• 5.  possibility of washing, drying and rehydrating the gels

• 6.  automation

• 7.  simultaneous analysis of anions and cations