Is it possible to separate peptides and amino acids by using HPLC equipped with a UV-visible detector?
Yes. Peptides absorb from 200-230 nm, perhaps 280 nm depending on the amino acids. As for free amino acids, their absorbance depends on the amino acid, some absorb in the UV, others won't.
I want to prepare 0.05 M phosphate buffer of pH 7 from Na2HPO4 and KH2PO4. How to proceed?
10 November 2018 6,618 0 View
Hello! Friends I need to analyze naturally occurring toxic substances Hypericin in Food matrix. Can somebody suggest a suitable HPLC or other method for that? Your inputs will highly be...
09 October 2018 406 0 View
A typical formula often used for the concentration of an unknown sample concentration as follows: Conc in ppm= (standard area/ sample area)* stnadard conc.* Dilution factor Can anybody derive...
06 July 2018 9,711 6 View
Please provide me any suitable methods if any for the quantitative determination of ascorbyl stearate in Margarine or any Oil related sample.
02 March 2018 8,149 1 View
The catalytic properties of ferrospinels crucially depend on the distribution ofcations among the octahedral and tetrahedral sites of the spinel structure and the catalytic activity was mainly due...
02 March 2016 6,599 1 View
I want to separate glycine and its oilogomer with hplc having uv-vis detector at wavelength of 195 nm but i failed to do that. Can anyone suggest some suitable method to do that?
31 December 2015 2,882 4 View
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11 December 2013 9,026 1 View
A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...
11 August 2024 9,801 2 View
Can anyone explain this method? Especially the last statement where it says only at 1.5 to 2.5mins was the MS/MS connected to the UPLC. How is that possible, is it a feature in this specific...
11 August 2024 8,141 3 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
Hello experts, Does anyone know any free software about retention index prediction ?
08 August 2024 7,403 2 View
I'm working on selecting antibodies against a recombinant protein that has a His-tag. My idea is to first bind the recombinant protein to a HisTRAP column and then use this column for an affinity...
07 August 2024 505 3 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
Are there any suggestions or insights you can provide to help address this problem
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I am planning to collect human fecal samples for metatranscriptomic analysis using MGI. These samples are from indigenous people living in a region with high temperatures. I will have access to a...
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Hello everyone, I'm encountering an issue with my electrochemical impedance spectroscopy (EIS) measurements and would appreciate some insights. Experimental Setup: Electrodes: Gold interdigitated...
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Mobile apps can be a powerful tool for enhancing academic performance, how can we use mobile apps for improving academic performance
04 August 2024 9,492 0 View