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Questions related from Sasha Nealand
Where does this RV followed by a number come from?
17 August 2023 352 3 View
17 August 2023 3,420 3 View
What information do the blue(positive contour) and green(negative contour) tell me in HSQC? Can I discover any information about a structure depending on if the contour is negative or positive?
17 August 2022 7,946 5 View
was reading an older textbook (Duddeck) they describe H,C correlated COSY, interpreted as C connected to H. Is this essentially interpreted the same as HSQC and HETCOR?
11 July 2022 8,134 3 View
If I have extracted a plant with ethyl acetate and found that this extract has an effective activity, is it generally safe for humans to ingest this extracted plant material? Ethyl acetate is GRAS...
07 April 2021 520 6 View
Wondering if anyone has done this successfully? Thinking of backflushing and perhaps running methanol through the MilliQ filter column to clean it so it can be reused.
13 January 2021 5,893 0 View
is it true that monoterpene alcohols are blue and esters are violet? what compounds do red green and yellow spots indicate?
27 April 2020 9,821 3 View
If for instance the chosen best 3 solvents with respective solvent strengths are dichloromethane(3.1), ethyl acetate(4.4), chloroform(4.1) how to calculate how much hexane to add to adjust all...
31 March 2020 5,955 0 View
I want to irreversibly bind my small organic terpenoid compound to a bead so I can use it as in immunoprecipitation to fish out of a cell lysate what it might bind to. Does anyone have a procedure...
15 February 2020 1,576 1 View
How can students find enough money to fund the analytical instrument room (LC/MS, NMR, GC/MS) at their University so that they can can continue their doctoral research?
18 December 2019 631 3 View
Is there any problem with using 0.1%TFA in HPLC mobile phase if the purpose is isolation, structure elucidation by NMR and bioassay?
20 July 2019 4,808 1 View
Can anyone explain to me a simple procedure and solvent that would help me to obtain pure crystals? I am trying to isolate a pure compound that came off a silica column it was a solvent mixture of...
20 October 2018 415 5 View
I am reading a journal paper in which separation of a plant extract was done on a C18 HPLC column using normal phase solvents of hexane:ethyl acetate, is this possible?
25 July 2018 2,427 13 View
I separated a crude plant extract into fractions on a silica column using ethyl acetate and hexane, now I want to look at the fractions using LC/MS. The problem is that our instrument room only...
25 July 2018 4,261 6 View
