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?
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
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
What exactly is the 'initial water flux' in membrane systems and how do adjust it if for e.g I want the initial water flux of FO and RO to be the same
01 May 2023 793 2 View
I have carried out MFC experiments on three different volumes, 50, 500 and 1000 mL of wastewater. Results after MFC treatment shows that TDS and EC are more in larger volumes of water i.e. TDS and...
09 August 2024 9,621 0 View
Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.
07 August 2024 8,782 3 View
Palmitic acid presence in aqueous fraction
05 August 2024 8,624 4 View
I am interested to know the behavior of dyes toward light. Specifically, Blue dyes re-emit the spectrum, especially from the green zone (known as principal in LED lamps, and blue dyes are known...
05 August 2024 3,290 1 View
I used humic acid at 0.044 g/kg soil in my pot experiment. But finally, I have to recommend kg/ha. Each pot's soil weight was 11 kg. What is the solution?
02 August 2024 7,186 6 View
I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...
30 July 2024 6,420 1 View
What roles do microorganisms play in Earth's ecosystems, and why is their role so important and role of microorganisms in secondary wastewater treatment?
23 July 2024 5,032 3 View
I would like to know the role of the TFA (trifluoroacetic acid) used on reverse phase chromatography c-18 column. It's is often used with a concentration of 0.1% on the mobile phase.
23 July 2024 8,075 3 View
As mentioned in literature the addition of CaCO3 to MRS Agar media is considered as an indicator for lactic acid producing bacteria, so I wonder if we can add CaCO3 calcium carbonate to any other...
20 July 2024 7,504 0 View
I synthesised a nanocarrier by conjugation MOF (MIL-100) with folic acid for use in chemotherapy but the samples didn't dissolve completely in aqueous solution or DMSO. Instead, they only...
19 July 2024 8,522 0 View