I am working on GC_MS/MS (Agilent), can anyone tell me why the pecentage of Water (H2O) comes 310.1%, Nitrogen (29.01%) and Oxygen (15.2%).?

More Alamgir A. Dar's questions See All

Is there any procedure or an equation for converting total carbon to organic carbon or any equation that helps to obtain the value?

I have analysed percentage carbon (total) using CHNS Elemental Analyzer for the forest soils. Now, I would like to obtain SOC content from the obtained value for which I am looking for a procedure...

29 January 2021 5,551 8 View

Whom should be given the priority for vaccination for Covid-19?

Mass vaccination for Covid-19 is going to start very soon. Whom do you think should be given priority for vaccination? Senior citizens, frontline workers or students? Why?

24 December 2020 8,267 6 View

Anyone knowing any software for scientific graphs plotting?

I need some help

03 December 2020 6,794 6 View

Any good references for writing a master thesis for new business idea?

I am a Masters's student and I want to write my Master Thesis for a new business idea/startup. I have been searching for references that I can use as a guide to starting my thesis proposal and...

18 October 2020 9,820 2 View

Crustal Modelling by Gravity and Magnetic Data?

Dear Researchers, What are the Convenient methods for Crustal Modelling using Gravity and Magnetic Data?

20 September 2020 8,977 3 View

Can anyone provide me the literature/method for Quinalphos pesticide determination by UV-Vis Spectrophotometer?

Quinalphos: An Organophosphate pesticide

17 July 2019 7,304 5 View

What is the most suitable filter vial for amino acids in methanol for running in uPLC?

I am running amino acids in uPLC. The aa are extracted from bilogical fluids using methanol. Then, it is recomanded to filter the sample before runing in uPLC. However, the are so many types of...

24 June 2019 7,476 4 View

Can we do a semi-quantitative protein analysis using SDS-PAGE, by UniProtKB protein database?

I have done SDS-PAGE for serum proteins (NP-protein interaction) and i am getting quite a good number of bands, now i want to probably identify the protein that are associated with the NPs, can i...

08 April 2019 5,240 3 View

Is it good to do M.tech in Nano Technology after B.E in E&C?

Hi, I am an engineering graduate in E&C. Is it good to do M.tech in Nano Technology? From aicte faculty norms, I find that one should have b.tech & m.tech in the relevant branch for getting a...

16 January 2019 6,890 3 View

What is the right dose of Lipopolysaccharide (LPS) that could successfuly induce inflammation in Wistar rats and increase cytokine levels ?

kindly inform what dose of LPS is suitable for Inducing Inflammation in wistar rats. Also inform about the best route of administration LPS. what is the time gap that should be maintained to...

09 December 2018 9,098 1 View

Which fluorescent dye to use for measuring total ROS production?

Is DCFDA appropriate for measuring total ROS production, or can it only detect certain types of ROS? If I want to measure total ROS production, which dye should I use?

01 March 2021 9,447 3 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Why do a weight decrease for thermal degradation in nitrogen gas condition?

Hi all The question is related to TGA(Thermogravimetric analysis). Thermal degradation easily understood but why do samples weight decrease? altough just binding is broked, the weight of...

26 February 2021 1,100 5 View

Steps to calculate activation energy by coats & redfern method?

I'm a chemistry student and I'm researching the kinetic degradation of mixed plastic waste. I'm having trouble calculating the activation energy by the coats & Redfern method. The data that...

24 February 2021 974 1 View

How much costs direct reduction of nitrogen on farmland in terms of lower crop yield?

Dear research fellows, I wonder if someone knows how much direct reduction of nitrogen on farmland costs in terms of lower crop yield expressed as EUR/kg nitrogen (or similar)? I understand that...

15 February 2021 1,323 3 View

Where would? can? positive charge(vacancy) be when grounded?

Hello I plasma(H2N2) treated Al2O3 plate (edge is connected to ground) and wondered if oxygen vacancy migration on the plate can occurs as electrons escape through edge. Or whatever positive...

15 February 2021 8,118 1 View

Are there alternatives to the Devarda alloy when estimating nitrogen?

Are there alternatives to the Devarda alloy when estimating nitrogen? devarda alloy is reducing the nitrate to ammonium

15 February 2021 8,838 3 View

ZnS oxidizes to ZnO!!why??

when I put my ZnS solution in the chemical bath, the ZnS oxidizes so there are ZnO peaks appearing because of the reaction with the oxygen in the air, despite the fact that I close the beaker...

14 February 2021 5,778 9 View

How do I prepare and store insect samples for JH measurements?

I need to preserve termite samples for future quantification of juvenile hormone in their bodies. Or extract the Juvenile Hormone and keep that samples stored for future quantification. I may need...

09 February 2021 1,995 1 View

William Letter

Sounds like you may have a leak. Contact the person at your school trained to maintain and support the GC-MS system.

Alamgir A. Dar

William Letter Thanks

Selim Jallouli

the high values may be the result of an air leak, otherwise you may have run the complete autotune of the systems without waiting sufficient time for the systems to be under vacuum and at default operating temperature (ion source at 230℃ and quadrupole at 150℃)