1　　Alternate column regeneration with a 10 port valveM

1 　　Alternate column regeneration with a 10 port valveM

2 　　Backflush of Precolumn to Vent

3 　　Detector Selection from Two Columns

4 　　Heart Cut Trapped in a Loop and Injected Onto a Second Column

5 　　Loop Sampling with Backflush of Precolumn to Vent

6 　　Loop Sampling with Two Column Sequence Reversal

7 　　Same Sample to Different Loops

8 　　The post sample is absorbed in advance

9 　　Sample Injection and Heart Cut to Detector

10　　Sample Injection with a 6 Port Valve

11　　Sample Injection with End and Heart Cut to Column 2 and Front Cut to Detector

12　　Simultaneous Injection of the Same Sample onto Separate Columns

13　　Two Column Selection

14　　Two Different Samples to Same Column