I have an HPLC-DAD system and need to separate and quantify organic acids in coffee. What is the best column for this purpose? Does anyone have an implemented method?
This column :Agilent Polaris C18-A may be suitable,
a polar-embedded C18 bonded phase, which is compatible with 100% aqueous solutions and eliminates the risk of stationary phase collapse
There is a way to convert an anyformat-PDB file into a charmmgui-PDB file without using the charmmgui website? Antechamber or OpenBabel or similar? Another software able to convert?
01 June 2023 9,754 1 View
I am using a GCMS system to analyze ambient air samples looking for different VOCs. For calibration, we used a standard cylinder with the target gases. We found that with the method we were using...
09 October 2019 4,407 3 View
Approximate concentrations are require in compared with the WHO permissible limts
11 August 2024 2,723 1 View
Hello, Why do i see this baseline drift when i compare my blank (black) to the sample (blue)? Any suggestions as to why this happened? Thank you!
11 August 2024 3,770 4 View
Hey there, As a synthetic chemist delving into theoretical calculations for my imidazolium-based organic molecules, I would greatly appreciate any guidance on the appropriate input instructions...
09 August 2024 5,444 7 View
Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.
07 August 2024 8,782 3 View
I used humic acid at 0.044 g/kg soil in my pot experiment. But finally, I have to recommend kg/ha. Each pot's soil weight was 11 kg. What is the solution?
02 August 2024 7,186 6 View
Hi everyone, I'd like to better separate two close peaks coming from a bioconversion sample, I'm currently using a C18 KromaPhase 4,6mm Ø.I. SCHARLAU, particle size (µm): 10, pore size (Å): 100,...
30 July 2024 435 3 View
how to separate the organic reaction stereo isomers compounds are separate from the reaction mixture any simple methods are available
23 July 2024 8,025 4 View
One has to understand about the enhancement procedures and treatment systems I can list around 12 procedures which are tried and tested and are proven so let us see how many in total the experts...
20 July 2024 3,392 2 View
I work on producing organic fertilizer from rice husk. how can I reduce the bio-conversion time ?less than two months
20 July 2024 6,049 3 View
Is this organic cow dung manure now important than artificial fertilizer.if good then why ?
19 July 2024 9,052 2 View