Clavulanic Acid internal standard ?

17 September 2021 1 2K Report

Helo everyone I'm upon developing new method for analyzing clavulanic acid using Ms/Ms with ESI in the negative mode and the problem what I have that I can't find a proper internal standard that ionized in the -ESI and match the same chromatography conditions of it Please any suggestions? and what is the possible m/z ions in the -ESI for the suggested internals?

T. H. Al-Noor

using metronidazole as an internal standard

Badges
Science topic

More Ibrahim Jubrail's questions See All

My question concerns MTT cell viability assay?

Despite not having cells in the media, I am getting purple color. I have tried many troubleshooting methods, varying media types, and even different MTTs from different companies to figure out the...

21 July 2024 9,914 1 View

Guidance needed for preparing the hydrogel samples for the XRD instrument?

I'm working with a hydrogel sample and I'd like to perform XRD analysis. Can anyone offer guidance on preparing the hydrogel for the XRD instrument? Specifically, I'm unsure about the best method...

20 July 2024 3,611 4 View

How can I extract the mathematical equation from existing Neural Network Model?

There exists a neural network model designed to predict a specific output, detailed in a published article. The model comprises 14 inputs, each normalized with minimum and maximum parameters...

14 July 2024 2,714 3 View

Why does my IVT gRNA product gives HMW smear in gel?

We are using MEGAshortscript™ T7 Transcription Kit for transcribing gRNAs from linearized plasmid templates. (MSP3485 digested with HindIII) (https://www.addgene.org/140082/) We let the reaction...

01 July 2024 6,342 0 View

How can Abaqus CAE be utilized to assess the variation in wall thickness throughout a plastic bottle following a blow molding simulation?

Hello ResearchGate Community, How can Abaqus CAE be utilized to assess the variation in wall thickness throughout a plastic bottle following a blow molding simulation?

26 June 2024 9,281 4 View

JCR 2024 Impact Factor Download File-Factors caused decline in IF are?

Why the IF of almost all journals declined so much? For the file download go to https://www.researchgate.net/post/JCR_Impact_Factor_2024-Factors_causes_decline_in_IF

21 June 2024 3,358 0 View

When use a HOMER Pro to design hybrid system PV/electrolyzer/hydrogen tank. How can I use all electrical load to power the electrolyzer?

Simulating a Hybrid System with PV, Grid, Electrolyzer (No Load) in HOMER. here is a question about how to use HOMER Pro to design a solar PV system for water electrolysis using electrolyzer for...

05 June 2024 5,609 0 View

Expert questionnaire, Is it possible for people with a specialty in music psychology to evaluate this questionnaire? Through the link below?

It is possible for people specialized in music psychology to evaluate this questionnaire Through the link below Thank you https://forms.gle/qzoD7jN2UDUhMjwQ7

02 June 2024 9,546 0 View

How can we extract DNA from yeast isolates without using any lysis buffer or lysis enzymes? Is there any manual protocol?

31 May 2024 548 4 View

Please could colect all my publications under my name ?

please could collect all my publications under my name ?

30 May 2024 2,891 1 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

The aqueous fraction of the hydroethanolic extract is showing the presence of palmitic acid. What is the mechanism responsible ?

Palmitic acid presence in aqueous fraction

05 August 2024 8,624 4 View

In the presence of VERY high concentration (1000 ppm) of silicon, the adsorption isotherms of arsenic are showing anomalous trends, why so?

I conducted an adsorption experiment of arsenic on soil in the presence of different doses of silicon as competing ions to see the effect of silicon on arsenic adsorption and desorption. I took 5...

03 August 2024 6,500 3 View

How to convert g/kg Humic acid dose to kg/ha?

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

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

What change would occur in physics if the three different sizes of the proton and the two sizes of the deuteron accepted as new physical constants?

For people today, the enigma of the size of the proton still remains enigmatic. However, being myself a researcher in new physical theory which makes it possible to extend the different standard...

28 July 2024 7,823 1 View

Standard curve of H2O2?

Hi, I need to prepare a standard curve of H2O2 to evaluate the primary products of oxidation. H2O2 I have is 35%. How do I prepare a stock of H2O2 10 microlitere. If s.o has experience, I would be...

26 July 2024 3,460 2 View

Why is trifluoroacetic acid (TFA) used in c-18 column?

I would like to know the role of the TFA (trifluoroacetic acid) used on reverse phase chromatography c-18 column. It's is often used with a concentration of 0.1% on the mobile phase.

23 July 2024 8,075 3 View

What is human-computer interaction (HCI)?

22 July 2024 10,056 2 View