Ok take a gander at this chromatograph.
Did you notice those errors which would GREATLY hamper any analysts ability to accurately determine a samples concentration or it's "purity is 90%" ?
1) Remember whenever the UVa is listed as a PERCENTILE RATHER THAN as mAU
2) Notice the retention time of 5 MINUTES, this feature alone greatly reduces the likelihood the large peak at 4.37 is an AAS. (The sample was supposed to be a generic GH)
3) Note how asymmetric the 4.37 peak is! The left side is almost vertical while the rightward aspect forms several slopes with "spikes".
4) Observe the "shouldering" between 5-6 min!
5) Compare this large peak to the majority I have posted (symmetric wo spikes, tailing or shouldering
6) I mean even the smaller peak at 8.64 has much more reliable features.
*7) Compounded these features should create considerable angst about the reproducibility of any purity or concentration estimate.
BUT HECK THERE IS EVEN MORE WRONG HERE!!!
8) No UV wavelength is mentioned
9) No concentration curve is displayed or even mentioned
10) The run duration is LIMITED TO TEN MINUTES! (Go back and look at the HPLC's I posted bc several of the sample AAS peaks occur AFTER 10 MINUTES) FYI the standard run time is about 30 min, and if more detail is desired the peak or peaks of interest are "coned in"!
TEN SHOULD DO FOR NOW, PATHETIC! AND TO THINK SOMEONE PAID FOR THIS ANALYSIS!
Did you notice those errors which would GREATLY hamper any analysts ability to accurately determine a samples concentration or it's "purity is 90%" ?
1) Remember whenever the UVa is listed as a PERCENTILE RATHER THAN as mAU
2) Notice the retention time of 5 MINUTES, this feature alone greatly reduces the likelihood the large peak at 4.37 is an AAS. (The sample was supposed to be a generic GH)
3) Note how asymmetric the 4.37 peak is! The left side is almost vertical while the rightward aspect forms several slopes with "spikes".
4) Observe the "shouldering" between 5-6 min!
5) Compare this large peak to the majority I have posted (symmetric wo spikes, tailing or shouldering
6) I mean even the smaller peak at 8.64 has much more reliable features.
*7) Compounded these features should create considerable angst about the reproducibility of any purity or concentration estimate.
BUT HECK THERE IS EVEN MORE WRONG HERE!!!
8) No UV wavelength is mentioned
9) No concentration curve is displayed or even mentioned
10) The run duration is LIMITED TO TEN MINUTES! (Go back and look at the HPLC's I posted bc several of the sample AAS peaks occur AFTER 10 MINUTES) FYI the standard run time is about 30 min, and if more detail is desired the peak or peaks of interest are "coned in"!
TEN SHOULD DO FOR NOW, PATHETIC! AND TO THINK SOMEONE PAID FOR THIS ANALYSIS!