09 September 2018 0 5K Report

I want conducting SARA analysis but i am unable to determine what dia column should i use and how much height od silica bed is required to effectively separate maltenes into 3 components.

More Payas Dandekar's questions See All
Why viscosity increases with torque and rpm?

I am calculating viscosity of my oil in water emulsion using a rotational viscometer with a disk shaped spindle. The fluid is less viscous upon observation. However when i measured the viscositu,...

04 May 2019 9,867 4 View

How to find interfacial tension of oil in water emulsion?

I have an oil in water emulsion of which i want to find interfacial tension using a pendant drop tensiometer. what is the correct procedure for the same?

04 May 2019 500 2 View

Does stability of emulsion depend in the way they are stored? (like in beakers and tubes)?

I have an oil in water emulsion in which more oil is dispersed in less amount of water, the oil is viscous in nature. the emulsion seems stable when kept in tubes while it the same seems unstable...

02 March 2019 3,072 3 View

Can a separated O/W emulsion be mixed again?

If an oil in water emulsion made by mixing oil in water using surfactant separates after sometime, then can it be mixed again to form the emulsion? Kindly provide references (if any) along with...

02 March 2019 6,837 1 View

How to make multiple emulsion samples of different composition from single large sample?

I am working on oil in water emulsion. i wanted to know that if i make a 250 ml emulsion of 60% oil and 40% water containing 1000 ppm surfactant and remove 50 ml from it for stability analysis....

09 October 2018 409 4 View

How to make multiple emulsion samples of different composition from single large sample?

I am working on oil in water emulsion. i wanted to know that if i make a 250 ml emulsion of 60% oil and 40% water containing 1000 ppm surfactant and remove 50 ml from it for stability analysis....

09 October 2018 4,142 1 View

What is the detailed procedure for SARA analysis of heavy crude oil?

I want the detailed procedure for SARA analysis, solvents required, apparatus and also detailed procedure on how to perform column chromatography with multiple solvents.

08 September 2018 7,230 4 View

What is the detailed process for column chromatography with multiple solvent systems?

I am working on crude oil and want to conduct SARA analysis which involves sequential elution with multiple solvent systems (4 as per ASTM procedure) i wany to know how to change solvent system in...

08 September 2018 8,976 3 View

How to draw small volume samples (like microlitres) of a high viscous liquid such as a liquid polymer?

I want to add polymeric additive to my sample but i want to add it in ppm level concentrations so i don't know how to draw few microlitres of viscous liquid. i tried with a micropippete but some...

07 August 2018 7,600 0 View

What are polymer based viscosity reducers? how they reduce viscosity of heavy crude? what research is going on in this field?

what is the mechanism by which the viscosity of heavy crude is reduced? what type of polymers are used as viscosity reducers? are they commercially available?

06 July 2018 2,190 0 View

Similar questions and discussions
Which type of compound does lamda max of 218 indicate in a uv-vis spectrum of a partially purified compound through column and TLC?

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

How can women be responsive when they can make love for hours?

… with my present female lover … she and I spend anywhere from two hours to six hours in caressing, touching, cuddling, hugging, lip kissing, deep kissing and intimate conversation before,...

11 August 2024 4,521 0 View

Can you connect an HPLC to a Mass Spec only at a certain time point?

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

RNA Extraction Using Hot Borate Method No Longer Working?

I've been performing RNA extraction on cotton petiole tissue for a few months now using the method described in the following paper, a derivative of the typical hot borate method...

08 August 2024 9,882 2 View

Can I use a HisTRAP column for affinity chromatography?

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

Hi, please what is the best tool on Aspen plus that can help me get the best inlet temperature and pressure for cryogenic distillation?

I am trying to recover liquid CO2 from a mixture of 0.6 CO2, 0.3 N2, and 0.1 O2. My aim is to recover about 99% liquid CO2 at the bottom of the column and make sure the amount of gaseous CO2...

06 August 2024 4,611 0 View

How to perform EEG source analysis on each trial of data separately?

Hello Everyone I have a question about structure for connectivity analysis on sources. My goal: preprocess and cut data into trials create headmodels, using template MRI file perform source...

30 July 2024 2,744 1 View

A positively charged and 10x his-tagged protein that doesn't bind to any chromatographic resin?

Hello everyone, I am currently working on a protein that is 10x his-tagged and positively charged (predicted pI=10.16). But when I tried to use Ni-NTA column to purify the protein, it's not...

24 July 2024 7,293 4 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

Issues with Malaria Coated Nitrocellulose Membrane Releasing Moisture?

Hello, I am currently working with Malaria Pf/Pan nitrocellulose membranes coated for malaria detection. After drying the coated membranes in an Incubator (overnight at 37°C), I've noticed that...

16 July 2024 7,937 1 View

Our partners will collect data and use cookies for ad personalization and measurement. Learn how we and our ad partner Google, collect and use data. Agree & close