Salvador Valero

3 Questions 10 Answers 0 Followers

Questions related from Salvador Valero

What's this peak?

Hi, i've injected 5 microliters of pure CHCl3 in a 250 mm C18 column, with ACN:H2O 80:20 as solvent, 1,0 ml/min. Something appears at 3,72 min, absorbing strongly at 210 nm. Is the CHCl3 absorbing...

21 December 2017 8,824 17 View

What do you think about this peak tailing?

Hi, the attached graph shows consecutive injections of analytical standards of dexamethasone sodium phosphate.(20-200 ppm) dissolved in the eluent. Conditions used: Eluent: Phosphoric acid 0,1 % +...

22 March 2017 8,060 13 View

Anyone familiar with VF-5ms column with methanol as solvent?

Hi, we'd like to analyze an SPE extract whose solvent is methanol, with a GC-MS/MS (ion trap), split/splitless injector, and this column. The supplier told us about not to inject in this column...

18 February 2015 6,865 3 View