How to preserve water for the measurement of Nitrate, Nitrite, Phosphate and Salinity?

More Nimesha Kalpani's questions See All

How to prepare matrix calibration curve?

I am developing method to identify drug using human saliva.The problem is should I prepare matrix calibration curve according to post spiked method or pre spiked method? Please explain me someone...

27 May 2024 3,949 2 View

World Congress on NURSING EDUCATION & PRACTICE - 12th Edition ?

Hi Everyone, Our research team has received an invitation to present our research work at the “12th Edition - World Congress on NURSING EDUCATION & PRACTICE" (World Nursing Congress 2024)...

06 April 2024 3,104 1 View

What is the purpose of adding salt to extract drugs from saliva matrix?

I need to optimize good extraction method to extract furosemide drug from saliva matrix and identify by using LC/MS/MS instrument. IN literature they have added salts and in some papers they have...

19 November 2023 7,437 0 View

How to find out LOD in spectroscopy methods?

Could Some one kindly explain me wat are the different experimental methods to find out LOD in LC/MS/MS method development? 1.How many blank sample generally needed? 2.What is the type of blank...

13 November 2022 408 4 View

LOD and LOQ of lc/ms/ms method development?

Hii, I am doing a research to find out pharmaceuticals in blood and urine matrix. Please let me explain how I can calculate the LOD and LOQ of my developed method? Should I prepare a matrix blank...

10 November 2022 2,587 3 View

RDF Calculation of water ?

Hi, I have a water simulation box with 116 water molecules. I used TIP4P water model. Now I need to calculate RDF of water-water, RDF of Oxygen-Oxygen and RDF of Hydrogen-Oxygen. I tried to...

05 November 2022 6,386 1 View

Electron Bubble in MD simulations ?

Hello, I need to introduce an electron bubble to the liquid medium in MD simulation. Does anyone know how to introduce electron bubbles to the liquid medium using GROMACS? Cheers, Kal

17 October 2021 3,025 1 View

Can we do molecular dynamics for positrons?

I need to do MD simulation for positrons (antiparticles of electrons). Is it possible to do MD for positrons in the liquid medium?

17 July 2021 6,799 3 View

How to analyse likert scale responses to find out is there any difference between responses of male and female ?

I have collected responses for questions asking about satisfaction of a educational program.I have checked the satisfaction asking 6 question with 5 likert scale responses.(Strongly agree to...

15 June 2021 9,059 3 View

How to find sample size of a cross sectional survey study with no previous 100 % similar study?

Hii, I am planning to do a cross-sectional survey study to find out supplement prevalence among Sri Lankan university athletes. During the literature survey, I found that similar studies have not...

19 February 2020 5,233 2 View

• What the possible Persistent Organic Pollutants and Heavy metals present in fluorspar, sediments, and water bodies around its mining area?

Approximate concentrations are require in compared with the WHO permissible limts

11 August 2024 2,723 1 View

Handling Missing Data and Building a Predictive Model with Incomplete Information ?

I am developing a predictive model for a water supply network that involves 20 influencing points. However, I only have historical data for 10 out of these 20 points. I would like to know how to...

10 August 2024 4,005 2 View

Do interactions between biosphere, carbon cycle, & water cycle impact global warming & interaction between atmosphere & hydrosphere?

How do interactions between the biosphere, the carbon cycle, and the water cycle impact global warming and interaction between the atmosphere and the hydrosphere?

09 August 2024 3,291 2 View

Is it true that $\det(V(A))$ may be only $\pm 1$, depending on $n$, for the last symmetric tridiagonal matrix $A$?

One can try to generalize the Vandermonde determinant in the following direction: Let $A$ be any symmetric $n$-order square matrix. Consider its powers' diagonal elements $(A^k)_{ii}$ and...

08 August 2024 6,690 1 View

How does one derive the standard deviation of a scale?

Dear all, I am working on analyzing data from a survey on student satisfaction. The survey contains items with a 7-point Likert response format that produce 12 scales related to different areas...

05 August 2024 2,141 4 View

How to Add Missing Water Molecules in Protein-Membrane Simulations?

I have protein-membrane simulations (PDB, PSF, DCD) and have noticed that water molecules near the protein are not visible in the simulations. How can I fix this issue? Is there a way to place the...

04 August 2024 1,200 2 View

Why results of ROS flurescence are negative as there was no bacteria within?

Hello. I am working on ROS production of two systems: system A is cerium oxide and hydrogen peroxide, system B is cerium oxide nanoparticle, hydrogen peroxide and potassium bromide. I did some...

04 August 2024 5,974 3 View

Why is nonpoint source pollution potentially more harmful and difference between point and nonpoint sources of water pollution?

01 August 2024 1,180 2 View

How do living organisms play a role in the water cycle and why is nonpoint source pollution potentially more harmful than point source pollution?

01 August 2024 7,061 2 View

The use of data from PubChem for commercial purposes?

Hi, I'm curious to know if data on chemical compounds from PubChem, such as water solubility properties, can be used to train a machine learning model for commercial purposes. Will this infringe...

30 July 2024 8,707 1 View

C. Mei-Ling Hamilton

Hello! Perhaps the following publication from the U. S. Environmental Protection Agency might be of some assistance to you:

Quick Guide to Drinking Water Sample Collection

(U. S. EPA, 2016)

https://www.epa.gov/sites/production/files/2015-11/documents/drinking_water_sample_collection.pdf

N. B.: You might find the information on pages 10 and 11 to be especially helpful.

Nimesha Kalpani

Hello! Thank you for the suggestion.

J. C. Tarafdar

Please have a look of the attached file.

Thank you for the suggestion Dr.Tarafdar sir.

You are quite welcome.