I about to prepare report were the RDS over the repeated injections of standards should be calculated from ratio of area of standard to internal standard. So, I have created to tables one for standards and one for the internal standard and where the variable based on the peak area was defined with the key value of compound name. In the table one a new column was added were the ratio of peak area of standard and newly defined should be calculated. My problem is the variable for the internal standard did not even show in the list of available variables even in the list of all variables is defined. Any idea how to do it or where I am doing a mistake. Thanks a lot.
Table 2 for internal standard
thanks a lot for your ideas.