25 Questions 8 Answers 0 Followers
Questions related from Edzani Mukonazwothe
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...
10 June 2024 2,586 0 View
I want to use this buffer in urine for NMR analysis
12 November 2023 5,697 1 View
Which anions from multi-elemental standard solution will elutes first in anion exchange chromatography?
13 September 2023 1,355 1 View
Which anions elutes first in anion exchange chromatography?
11 September 2023 9,492 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...
25 August 2023 1,526 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...
29 May 2023 6,283 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...
24 May 2023 6,946 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...
18 May 2023 549 0 View
Do I have to dilute my urine samples with nitric acid before I analyse them in ICP-OES?
04 May 2023 5,866 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?
04 May 2023 7,643 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
02 May 2023 757 2 View
what is the best and also cheap method I can use to measure urine and ammonia in urine? We have UV-VIS in our lab
02 May 2023 1,110 1 View
Please suggest an affordable and effective method to measure urea and ammonia in the urine
24 April 2023 1,947 2 View
Can I use baseline flux and membrane flux during fouling to determine the normalized flux of the membrane? I conducted baseline experiments using NF membrane and also fouling experiments under the...
27 February 2023 8,622 2 View
Can I use a UV-VIS spectrophotometer to measure sulfate (SO42-) and nitrate that us on urine?
23 February 2023 5,474 5 View
Which chemical can I use to make 1000mg/L of Magnesium (mg) standard solution in 100ml 5% of nitric acid? I want to make a standard solution for ICP-OES.
09 February 2023 4,651 2 View
How do I prepare A multi-elemental standard solution of 1000 mg/L containing the elements of interest (mg, Na, K, and Na) in a 100ml containing 5% of nitric acid? I want to make a standard...
30 January 2023 4,532 7 View
How to prepare stock solution for multiple elements to analyze human urine in ICP-OES?
10 January 2023 9,070 0 View
I have Magnesium chloride (MgCl2) in the lab, but I want to make a solution that is equivalent to Magnesium chloride hexahydrate (MgCl2·6H2O) (0.831 g/L). What is the equivalent of the amount that...
02 November 2022 867 2 View
Hello please assist, How can I make a 2% of nitric acid solution in 100ml of water? if you don't mind please show with calculation so I to understand better. Thanks.
20 October 2022 7,264 4 View
Good day I would like to know how to make standard solutions of magnesium, phosphorus, calcium and potassium for ICP-OES. or is it better to just buy the ready-made ones instead? Thanks.
20 October 2022 1,880 2 View
Good day, If anyone can assist me, please. How do you measure ammonium and nitrogen from urine? what is the best simple method for someone who is new in chemistry if you can recommend the site...
16 October 2022 6,213 2 View
Hello, Can you please assist, I have FO CTA membranes and would like to know which chemical is the best preservative. And also the quantity and volume you use for the preservative. Thanks.
29 September 2022 6,140 2 View
Hello, Can someone assist me if they can please? I just started using Forward Osmosis membrane filtration for the first time. My supervisor told me to calibrate it by determining the Volumetric...
05 August 2022 8,417 0 View
Hello, I am planning to make synthetic wastewater for the simulation of municipal wastewater. I would like to know what are the best ingredients to use? Thank you
21 July 2022 8,620 1 View
