Hello folks,

We are looking to make a rather large investment in regards to PFAs testing. We are trying to decide between the following three units and was wondering if anyone had an opinion on which unit was better. The three units we are considering:

Agilent 6470

Waters Xevo TQ-XS

Thermo fisher TSQ Altis

It appears that the Waters is the most sensitive of the three based on the data we have seen from the vendor. Waters can hit PFBA at around 5 ng/L whereas the others are around 20n/L based on a calibration curve of standard points.

We are looking to do a modified direct injection method to avoid some of the sample prep. All instruments appear to be able to hit the 2ppt reporting limits required for us when using SPE sample prep.

Any thoughts, comments or suggestions are greatly appreciated.