We have a CHN-S-O analyzer from PerkinElmer, we have this problem that the combustion column breaks down ( at the surface of the packing ) after 2-3 run.
I'm using DSC 131evo, the heat flow is given by uV, and when performing peak area calculation, the heat is given by uV.s/mg. How to change this unit to J/mg or J/mol.
09 October 2018 8,148 1 View
One of the characterizations of synthesized nano-particles is particles size distribution. But what method or technique is the best ??
31 December 2017 538 7 View
Complete isotherms (Adsorption - desorption) of N2 was done using QuantaChrome iQC 6.... some of the data results are said to be non-monotonic pressure, what is the meaning of this message and...
11 December 2017 9,824 2 View
As it is known, He gas is more expensive than Ar gas, and both are inert gases. So is it possible to use Ar gas instead of He as the carrier gas for CHN analyzer model PerkinElmer 2400 ??
11 December 2017 8,112 1 View
Using AutoSorb iQc (BET - gas adsorption ) in the determination of SSA and pore size of powder materials a first step is out gasing which is done under ultra-vacuum and high temp. of about 300C,...
01 February 2017 4,971 4 View
Some metal oxides are called refractories, it means that they are stable at high temperatures. But.... do they also resist dilute acid or base conditions in aqueous media ??
03 April 2015 6,050 0 View
Scientific glass blowing is used to make discharge lamps or metal electrodes
31 December 2014 1,565 2 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
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
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
Dear QE-users, In the method where full MS positive mode and PRM mode are used, we always get an incorrect auxiliary gas reading (41 instead of 25). This only happens in this method; other...
06 August 2024 4,953 0 View
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
Hello guys! Do you have experience running a Oaxaca-Blinder decomposition on R applying person weights. How do you suggest doing it? I have a variable PERWT which gives more information on how...
04 August 2024 6,033 0 View
I am currently working on modeling FCC catalyst regeneration and have come across a point of uncertainty that I hope you can assist me with. In my previous models, I have utilized lumped kinetics...
30 July 2024 6,137 0 View
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
When I run autogrid4 it says: autogrid4: ERROR: Unknown receptor type: "Cr" -- Add parameters for it to the parameter library first! Look forward to your reply.Thank you so much!
29 July 2024 488 0 View