I need to analyse malachite green content in shrimp samples. (I have HPLC, GC and UV-Vis only. Not any ms detector). Hence method should based on that eupments.
FDA has a method in LIB here. Check it out.
Is that possible extract inorganic arsenic (As-III & V) simultaneously by using liquid-liquid extraction technology? What is the suitable solvent and complexing agents?
03 April 2019 6,007 2 View
I need to extract the As (III) and As (V) in mixture of organic and inorganic As mixture or from seaweed. Are there any way to stop the extraction of AB and organic arsenic compound?
02 March 2019 1,699 4 View
I need to extract seafood and need to avoid the arsenobetaine extraction, Are there any chemical reaction or extraction method to avoid the extraction arsenobetaine?
02 March 2019 8,070 4 View
EU regulation no 2074/2005 gave the maximum level of TVB for fish in 3 categories as 25, 30 and 35 mgN/100 g. I need to know what are the basic to set this level. Is that only organoleptic...
07 August 2016 3,584 2 View
Do you any reference/literature of the proximate composition, especially protein content of Chitala ornata (Knife fish) flesh?
04 May 2016 6,959 1 View
One of my student plan to do small survey, target to take an idea about "total diet study". Here, I upload it and please be kind enough to comment it to improve the study?
03 April 2016 3,617 0 View
Here, I attached one method published for vitamin C determination, in generally Iodine solution used, but here, they use KI & KIO3? How to calculate I2 mol in here without standerdization or...
01 February 2016 5,986 3 View
Some authors give the dioxin concentration, pg/g and some gave the concentration pg/g WHO-TEQ. How to compare those values and how to convert TEQ to pg/g?
10 November 2015 7,699 3 View
We like to know what are the new field and area of analysis food (fish) and feed using FT-NIR. Can you suggest me the novel reserahc area or link of the publication which were perform using the...
05 June 2015 9,217 0 View
I need to APHA method for trace metal analysis in water and sediments, but that method is not available with us. Please give me the soft copy of that method.
11 December 2014 1,501 3 View
Approximate concentrations are require in compared with the WHO permissible limts
11 August 2024 2,723 1 View
A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...
11 August 2024 9,801 2 View
Can anyone explain this method? Especially the last statement where it says only at 1.5 to 2.5mins was the MS/MS connected to the UPLC. How is that possible, is it a feature in this specific...
11 August 2024 8,141 3 View
Hello, Why do i see this baseline drift when i compare my blank (black) to the sample (blue)? Any suggestions as to why this happened? Thank you!
11 August 2024 3,770 4 View
Hey there, As a synthetic chemist delving into theoretical calculations for my imidazolium-based organic molecules, I would greatly appreciate any guidance on the appropriate input instructions...
09 August 2024 5,444 7 View
Hello experts, Does anyone know any free software about retention index prediction ?
08 August 2024 7,403 2 View
I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...
08 August 2024 8,329 0 View
I'm working on selecting antibodies against a recombinant protein that has a His-tag. My idea is to first bind the recombinant protein to a HisTRAP column and then use this column for an affinity...
07 August 2024 505 3 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
Dear QE-users, In the method where full MS positive mode and PRM mode are used, we always get an incorrect auxiliary gas reading (41 instead of 25). This only happens in this method; other...
06 August 2024 4,953 0 View