Quynh Khoa Pham

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Questions related from Quynh Khoa Pham

Acidic and salty form of a given compound and electrospray ionization (ESI) and mass spectrometry?

Dear to whom it may concern, I would like to kindly ask you about the ionization of acidic and salty forms of a given compound in electrospray ionization. To be more specific, when I...

17 April 2023 8,778 3 View

Acesulfame Potassium and Acesulfame and Conversion?

Dear to whom it may concern, Based on ChemAxon, I calculated pKa values of Acesulfame as follows: 1. pKa (Strongest Acidic): 3.02 2. pKa (Strongest Basic): -6 Because I would like to convert...

26 November 2020 4,752 3 View

Difference between Porous Graphitic Carbon and Graphitized Carbon Black?

Dear to whom it may concern, May I ask you about the difference between porous graphitic carbon (PGC) and graphitized carbon black (GCB) in terms of surface properties, retention mechanisms, and...

11 October 2020 4,636 3 View

Carbonaceous Sorbent Materials and Force of Retention?

Dear to whom it may concern, I am investigating carbonaceous materials to treat aqueous samples but I have no knowledge of these materials. May I ask you some questions as follows? 1. Whether...

10 October 2020 3,916 1 View

Retention of analytes on C18 column can be slightly affected by buffer concentration?

Dear researchers, I would like to ask you whether the retention of analytes of interest on the C18 column can be slightly affected by buffer concentration. I have analyzed a mixture containing...

01 January 1970 1,357 12 View