What is the simple procedure to determine the acid value of heavy crude oil and also what type of refractometer can be used to determine the refractive index of crude oil?
Hi
I used ABBE refractometer and the results were good .Regarding acid degree value you can use titration methods .
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...
19 March 2019 3,536 3 View
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....
17 October 2018 2,121 1 View
I want the detailed procedure for SARA analysis, solvents required, apparatus and also detailed procedure on how to perform column chromatography with multiple solvents.
04 September 2018 2,210 6 View
I am currently working on a project aimed at reducing the viscosity of heavy oil for pipeline transportation. i need some guidance regarding handling heavy crude in lab for eg. sample preparation,...
23 July 2018 8,607 4 View
I want to do a research project on manufacturing industries that strive towards quality improvement to minimize the costs and rework.
17 February 2018 5,135 3 View
For kinetics, can amylose or amylopectin be used? Why maltopentaose is used? Why not starch? Seen some papers which mention Km and Ki values using maltopentaose as substrate. Why?
20 November 2017 2,162 2 View
I have isolated a pure compound from a medicinal plant and now want to check its activity in mice models. In this case, what samples should I to take into account from the following?: 1. crude...
06 September 2017 202 5 View
Hi , I intend to separate a doublet of peak eluting from reverse phase HPLC column, along with the main peak, a shoulder peak appears which I want to get rid of the main peak. PDA detector at 245...
20 July 2017 4,141 4 View
I am looking at ubiquitination of protein caused by inflammation. When I do my experiments in HEK293 cells with overexpression of my tagged protein, I see typical ubiquitin smear for pulldown...
24 November 2013 5,648 2 View
I have been doing semi-quantitiative PCR for detecting TLR expression in mouse primary hepatocytes. I am facing a problem with my current set of primers. After optimization, I am getting no band...
01 November 2012 171 15 View
- According to specifications, the Max Moisture content of the Gum is 11% - °Bx readings were measured in triplicate in two different digital refractometer Metler Toledo
11 July 2023 5,345 0 View
Sugar determination in plant is vital in postharvest, physiology and in other related fields but aside from refractometer do you an ideas of an instrument/s use in the field for sugar...
15 April 2021 8,521 6 View
I am trying to isolate virus infected plasma from low and high density fractions using sucrose cushion method. Can I use a a handheld/portable refractometer to measure the density of the fractions?
02 February 2021 253 0 View
For my research it's needed to measure the concentration of the following sugars present in a potato tuber: sucrose, fructose and glucose. Is there a reliable method to measure these with a...
07 September 2020 5,898 4 View
I use microcapillary tubes (0.5 µl) to measure nectar volume in Dianthus carthusianorum flowers (= very narrow corolla tube and low nectar volume from ca 0.25 to 1 µl). The nectar volume is easy,...
25 May 2020 6,685 0 View
Is there any way we can substitute the prism that is used in refractometers. For example, introduce other components like lenses or sensors instead of a prism? An idea which could be tried? Could...
04 May 2019 8,157 3 View
What is the refractive index and viscosity of FBS and PBS to be used in DLS measurements. Please bear in mind, we dont have refractometer or viscometer in the lab. So, what are the values we...
21 April 2019 6,497 5 View
Hello, I am doing DNA-SIP for 13C labeling soil samples lately and I checked the SCI papers which have done DNA-SIP work. Generally, after ultracentrifugation, we do density gradient fractionation...
17 March 2019 3,581 2 View
We need to measure wavelength dependent refractive index of a liquid. Where we can get automatic critical-angle dispersion refractometer facility in India? Is there any other method to measure the...
31 December 2018 4,243 0 View
Is there any newer and more efficient or accurate equipment for measuring the Brix and pH of grape berries than a digital refractometer (Brix) and a pH meter (pH)?
28 December 2018 4,404 5 View