Hi all

I have a question about our amino acid analysis, We use the Waters provided method using the AccQTag column.

We have encountered some strange results for a couple of peaks of our amino acids. One being our Tyrosine peak which regularly seems to be jumping up and down in terms of %CV when all results are brought together. Just wondered if anyone had ever encountered this before? (not specifically just this peak) The analysis was done using one sample and re-analysing this in 20 assays.

As well as this we have encountered on the odd occasion a random larger peak than expected, again has anyone encountered this before?

regards

Kyle