Alejandro Cuadros

4 Questions 3 Answers 0 Followers

Questions related from Alejandro Cuadros

Have any idea of brands for toxicology standards ISO34??

Hi all, We are trying to conduct a toxicological research in control substances, however it has not been esay to get some of them as the most recognized brands (Lipomed, Sigma, LGC) have no...

29 July 2022 9,515 0 View

Agilent LC Ms/Ms 6410 vacuum error 1.23 and 5.7, what to do?

In my Agilent LC MS/MS 6410B a vacuum and communication is presenting repeatedly. After system is stable, it suddenly (minutes, days, weeks) shows either 1.23 or 5.7 error. Both indicating an...

28 July 2020 7,398 6 View

NDBA nitrosamines contamination HPLC Ms/MS Sciex +6500 System?

Dear network, Around six months ago we validated nitrosamines method on a Sciex +6500 / Agilent 1290 System and signals were great (Based to FDA method); after this numerous analysis we have done...

07 June 2020 8,648 1 View

Is possible to determine nitrosamines ionization HPLC Mass method in 6410B?

Dear network, I am trying to determine NMBA nitrosamine in UHPLC Ms-Ms Agilent 6410B according to FDA limits (2ng/mL). I am only reaching 700ng / mL. After this I cleaned dielectric capillary...

19 September 2019 362 1 View