How to prepare stock solution for multiple elements to analyze human urine in ICP-OES?
Hi all, I made synthetic wastewater samples and I was wondering if the integrity of the ions might change if stored for long time outside the fridge before analysis. Say foe example, I prepare...
09 June 2024 2,706 0 View
I want to use this buffer in urine for NMR analysis
11 November 2023 5,721 1 View
Which anions from multi-elemental standard solution will elutes first in anion exchange chromatography?
12 September 2023 1,398 1 View
Which anions elutes first in anion exchange chromatography?
10 September 2023 9,510 1 View
which concentration between 2% and 5% nutric acid is better to use to prepare for ICP-OES standard solutions ? I have multi-elemental solution, I want to make a standard solution for calibration...
24 August 2023 1,576 0 View
Can I determine the cross-flow velocity in FO with pure water as a draw and feed solution? This is my first time working with a Forward Osmosis membrane, we dont have flow meter attached in the...
28 May 2023 6,325 0 View
What is the procedure for determining the CFV in a bench-scale Forward Osmosis setup? This is my first time using the equipment. Should I initially calculate the mass change between the DS and FS...
23 May 2023 6,988 0 View
Considering the density, how do I prepare a 1% nitric acid solution from 70% nitric acid to dilute my unknown concentrated sample (1ml) for ICP-OES. How much volume is required from 1% to dilute...
17 May 2023 585 0 View
how many times do I dilute my concentrated samples before ICP-OES analysis? For example, do I use 2% nitric acid for the dilution of my wastewater samples? and how many times?
03 May 2023 7,657 0 View
Do I have to dilute my urine samples with nitric acid before I analyse them in ICP-OES?
03 May 2023 5,901 0 View
How do I calculate the stock solution to apply 100 uM MeJA for 1000 ml of plant nutrient medium ?
01 August 2024 723 0 View
I have been harvesting monocyte-derived macrophages from buffalo and cattle fresh whole blood using the same protocol for years and getting good macrophage cultures. Below is the protocol that I...
23 July 2024 4,074 2 View
I need to make a stock solution for radioisotopic incubations of freshwater sediments to study dark primary productivity but I have some confusion as to how I calculate the concentration of 14C...
15 July 2024 5,898 0 View
I placed mice in metabolic cages to collect urine samples for analysis. However, the majority of the samples have dried up. Is there any way to retrieve the urine in those tubes without...
14 July 2024 6,724 0 View
methylene blue stock solution
19 June 2024 10,030 3 View
The emerging markets have suffered from a state of stagflation. I hope you know your expectations according to your experiences regarding the implications for the stock markets,,,, risks and...
19 June 2024 4,410 3 View
I saw the iPSC about a week after holding the stock (12 well and 3 stocks) and there were very few cells attached, and some cells were differentiated. I wonder what the problem is. The plate is...
12 June 2024 6,087 0 View
I want to do Frap assay with ferrous sulphate heptahydrate (FeSO4.7H2O) as the standard. I have calculate the molarity which is 1 M or 1000 microMolar as the stock solution. How do I determine the...
11 June 2024 3,760 2 View
Hello, I recently started working with antibiotics and I do not have that much experience of making dilutions accurately. I want to ask if I suppose to add 200mg of antibiotic in 100ml of water...
08 June 2024 2,285 6 View
I just found many protocols but not specific for bacterial growth
30 May 2024 6,305 2 View