José Sánchez del Pulgar

4 Questions 12 Answers 0 Followers

Questions related from José Sánchez del Pulgar

Is there any available library of carotenoids UV-visible spectra for chemstation software?

Dear all, I’m performing an untargeted analysis of carotenoids in different matrices by means of HPLC-DAD, but I have not all the zis isomers standards for comparing my UV-visible spectra, so I...

15 March 2019 9,535 3 View

Does anyone know where could I find a reference material for nitrates analysis in vegetables?

Hello everybody, I have to quantify the nitrates amount in vegetables and I would like to validate my data with a reference material for nitrate content in vegetables. But I cannot find a...

13 April 2015 9,242 5 View

Can anyone advise me on B group vitamins separation in HILIC column by LC-MS/MS?

Hello. We are trying to analyse B vitamins by LC-MS/MS, and we have a Hydrophilic Interaction Liquid Chromatography column (HILIC) from Phenomenex: Kinetex 2.6 u 100 A; 100 x 2.1 mm. The mobile...

19 March 2015 6,268 8 View

Does anyone know how to neutralize the fatty acid methyl esters solution after MeOH-HCl methylation?

We have detected a low self-life of the chromatography column for cis/trans fatty acid methyl esters separation, and producers have said us it is because of the low pH of the injected solution....

18 November 2014 3,981 7 View