Dipankar Paul

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Questions related from Dipankar Paul

How to remove water from 85% orthophosphoric acid [[H3PO4]?

My experiment needs anhydrous orthophosphoric acid and we only have a 85% aqueous solution. Any method to dry it? Most of the literature I found deals with purification from metal ions present in...

19 January 2022 5,676 1 View

How can I synthesize and characterize tris-(triethylammonium) phosphate [(Et3NH)3 PO4]?

I tried neutralizing orthophosphoric acid with triethylamine using 1:3 stoichiometry by stirring the two liquids at room temperature but a lot of triethylamine remains unreacted which suggests...

09 December 2021 9,250 0 View

Can I purify guanosine monophosphate using DEAE-Sephadex A-50 resin (TEAB form)?

For purification of smaller molecules such as guanosine monophosphate, it is recommended to use DEAE-Sephadex A-25 but since I don't have that in hand, can I use DEAE-Sephadex A-50 instead? What...

03 November 2021 7,239 1 View

What is causing extra peaks to appear in 1H NMR of Propargyl bromide when recorded in D2O?

For a study I had to record the 1H NMR of Propargyl bromide in D2O where it is barely soluble. The spectra that I got had the peaks of methylene proton and terminal alkyne proton at d=3.87 (d,...

21 August 2018 6,365 2 View