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 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
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
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
We just purchased a multichannel and a single channel E1 Clip tip pipettes. In our first attempt to use them for an experiment they are not dispensing accurately? The rep told me that...
01 July 2024 1,983 0 View
Hello. I am here looking for help with the NO radical scavenging assay. I was working on setting up the assay with sodium nitroprusside and the Griess reagent as they do in most works. However, I...
27 May 2024 5,013 1 View
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
I have successfully run SWAT model in my study area, but I met problems in calibration by SWATCUP. My best result is that R square equals 0.50 and NS equals 0.46, which was low and far from...
27 May 2024 2,375 0 View
Advancements in Hemodynamic Monitoring: A Comprehensive Exploration Can you provide examples of specific scenarios where calibrated hemodynamic monitoring techniques would be particularly...
22 May 2024 8,499 1 View
My calibration is ruined when calibrating other gases and channels. Any idea what I might be doing wrong ? For example, our GC has He and H2 in channel 1 and when I calibrate channel , tyhe...
20 May 2024 6,861 0 View
In order to proceed with the quantification of an Azide Alkyne Cycloaddition reaction efficiency by using a fluorogenic probe with Cy5-DBCO, I first need to construct a calibration curve. The...
16 May 2024 6,266 5 View
I have a flow flux data and want to use it for calibration. Can you please tell me step by step how to do it?
15 May 2024 8,180 0 View
I have calibrated my GC-MS for 16 EPA PAHs using available methods. However, the last three compounds (Indeno[1,2,3-c,d]pyrene, Dibenzo[a,h]anthracene, and Benzo[g,h,i,]perylene) are not showing...
13 May 2024 4,966 2 View
Scenario: I got two data files (α-Fe and Fe-containing samples), and the file names contain the max velocity value. Confusion: 1. How should I plot the X-axis? Is +/- velocity with points...
07 May 2024 3,244 0 View