Lets try the question again.


I have created two models.  The first model will produce results like the sample contains %6043 .  But only sometimes.  The rest of the time it is pretty close.


The second model quantifies another way but..


If the first model shows %6043 than the second model is actually measuring substance B, not substance A.


So, most of the time I will be measuring substance A.  When it goes WAY out of whack, I know I found substance B, not A.  The second model should be used for the quantity of B, Otherwise the model results should be used for substance A.


The substance has both A and B molecules in it, but it will either be predominately A or mostly B.


If the substance is B, it hides the amount of A (and I get out of wack numbers for A) but substance A does not hide substance B.