Can anyone suggest a method for amino functionalization of cellulose paper?

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What are the best strategies for HPLC method development of retention of highly polar anionic compounds having multiple pKa values (2-12) ?

kindly suggest the best HPLC method development attempts

31 December 2018 1,158 4 View

How can I determine the sorption capacity in solid phase extraction analysis by GC-MS?

I would like to find the saturation sorption capacity of functionalized graphene for a selected ananlyte by dispersive solid phase extraction in an aqueous medium. Can anyone please tell me the...

11 December 2014 3,869 8 View

What are some separation methods for hydrophilic neutral analytes from a non-polar matrix?

I need to know the methods to disperse polar sorbent in non-polar matrix (dodecane). What kind of chances enhances this property. Please suggest any one have suggestions, experience and literature...

31 December 2013 1,896 1 View

Can someone suggest a suitable reference for conversion of 1-pyrenebutyric acid to 1- pyrene propylamine?

Above conversion involves schmidt reaction.

09 October 2013 4,486 2 View

What are the roles of the chemicals involved in the preparation of graphene oxide from graphite?

I am doing oxidation of graphite by modified hummers method. What happens when we add hydrogen peroxide? How does the color change to yellow?

09 October 2012 7,960 2 View

Baseline drift in HPLC? What causes this?

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

How to calculate CCS for Sodiated adduct ions and Multiply Charged Ions?

I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...

08 August 2024 8,329 0 View

Separation of organic acids-HPLC?

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

Determining the worth of a point improvement in Hamilton Depression Scale?

Dear readers, Thanks for your attention. I am wondering about the health economic problem of quantifying the value of interventions which a) prevent, b) improve symptom profile and c) ultimately...

05 August 2024 3,246 1 View

Conjugation of PEG-Amine to an Amino Acid Using EDC?

I am attempting to conjugate PEG to an amino acid at the C-terminus, for the purposes of producing nanoparticles. I have been told that PEG modified with amine groups can be used for this purpose,...

31 July 2024 2,033 1 View

Inquiry on Maximum Nucleic Acid Volume for 2.5 mL Liposome Solution?

I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...

30 July 2024 6,420 1 View

Is it possible to use a safer acid instead of monochloroacetic acid to convert bacterial cellulose to carboxymethyl cellulose?

Hi, researchers, Is it possible to use a safer acid instead of monochloroacetic acid to convert bacterial cellulose to carboxymethyl cellulose?

29 July 2024 4,570 0 View

Can the limit of quantification (LOQ) of an analytical method fall outside its linear dynamic range, or must it always be within it?

Can an analytical method's limit of quantification (LOQ) be outside its linear dynamic range, or is it always required to be within it? Please provide a thorough explanation supported by verified...

29 July 2024 7,198 9 View

Where to start the Analytical model for Dry sliding wear of metal surface ?

I am doing research on wear mechanism of the additive manufactured metal parts under dry condition. Please share the reference to start the analytical modelling of the wear prediction.

29 July 2024 6,115 0 View

My cfDNA extraction protocol using silica beads works with plasma collected in COD SAGM bags but not with plasma collected in K2 EDTA tubes. Why so?

I am currently performing cell-free DNA (cfDNA) extraction from plasma using an in-house developed kit that employs silica-coated magnetic beads. My protocol works effectively with plasma obtained...

28 July 2024 3,559 0 View