Hello, Anyone can help me with Mass Hunter unknown using NIST20 RI?
I would like to use RI information in the NIST20 to assistant unknown analysis employ Mass Hunter unknown.
First, How can I choose the RI base on the column ? In NIST search program, there is an option to choose the retention index base on column polarity but I can not find from Mass Hunter unkown.
Second, The RI calculated using RT calibration tools with NIST20. The RI for n-alkane is not hundred number (n-Heptane ,142-82-5,instead of 700, the calculated is 717)
Last. when select the RT match, it gives very few return. even the restriction is broader. The component RIs are different to the library RI ( the difference are more the 10 in most case).
It will be very appreciated if you give any suggestion.