I am analyzing FAMEs extract using GCMS. For quantitative purposes, I employ external standard method. A standard calibration curve was produced.
How can I quantify the FAMEs content from concentration (mg/L) to mg/g DW biomass?
You need the response factor (detector response versus concentration) for each relevant FAME you want to use. Thus, from that curve;
100 x [mg/L x L (volume)]/mg (sample weight) = % FAME
In order to determine the 'dry weight (DW)' use a Karl Fischer reaction (KFR) to determine the amount of water.
Dear Bruce, many thanks for your answer. Would it be possible for you to provide me with some clarification.
I have constructed a calibration curve ranging from 1000 mg/L to 50 mg/L and excel gave me this equation; y = 762013x + 2E+06.
Based on this equation, the unknown area is 5343039376, giving the concentration of 6958.754041 mg/L.
Would it be possible to change the concentration (mg/L) to mg/g?
It depends on several other factors.
What is your sample volume? It's usually 100 mL or 0.1 L.
What is your initial sample weight in grams?
What is the 'dry weight' of the biomass in %?
Are you sure you're in the linear range of the method?
I have concentrated all my sample by evaporating the solvents and reconstitute with 1 mL of hexane.
the initial weight of the biomass is 0.6949g.
Good. The answer is;
[6958.754041 mg/L x 0.001 L (which is 1 mL)]/0.6949 g = 10.01404 mg/g
Biomass, in this case is 'as is' and not dried.
Many thanks for your help Bruce, would it be possible for you to provide me with some reference regarding this calculation using external standard calibration curve?
thank you.
How can I define Planetary motion in ABAQUS CAE, how define motion of three rollers around a central axis and passive rotation about their own axis?
16 July 2024 4,145 1 View
What are the most effective remote sensing techniques and algorithms for detecting and analyzing land use and land cover (LULC) changes in rapidly urbanizing areas, and how do their accuracies and...
11 July 2024 6,695 1 View
My attempt to promote listening was "Using Short-stories". It works fairly but there could be better options. Role of Short Stories in Developing English Listening Skill
09 July 2024 9,078 4 View
I have tried to resolve this issue a little bit, but eager to get your insights and thoughts to make my efforts better. Using Homophones and Homographs in ESL Classrooms
04 July 2024 6,742 3 View
The contribution of "Distance Education" is immense, but still needs a lot of reforms. Universities generally adopt one another ideas and ignore the ideas of world wide scholars, distance...
04 July 2024 2,545 6 View
Hi to all of you! My goal is to create synthetic silica beads. These beads ought to have a specified size. Could someone please advise on how to proceed or give me the articles I need to finish my...
02 July 2024 8,170 1 View
"Today several adjectival phrases have been used to describe English like ‘International Language’, ‘Lingua-Franca’, ‘Language for Globally Connecting’, ‘Library Language’, ‘Official Language’,...
01 July 2024 8,406 5 View
In educational institutions where English is taught as a second language, only 25% of listening happens in English but rather 75% of listening takes place in other language like Hindi/Urdu/Punjabi...
28 June 2024 6,353 4 View
Hello, I am having a difficult time finding the incident plane wave wavelength dependent spectra of the lights source to find the EQE. Please advise.
26 June 2024 7,274 1 View
Write a reflective essay on the importance of teacher involvement in curriculum development
15 June 2024 4,240 7 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
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 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
Can an analytical method's limit of quantification (LOQ) be outside its linear dynamic range, or is it always required to be within it? Please provide a thorough explanation supported by verified...
29 July 2024 7,198 9 View
I am doing research on wear mechanism of the additive manufactured metal parts under dry condition. Please share the reference to start the analytical modelling of the wear prediction.
29 July 2024 6,115 0 View
Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...
27 July 2024 5,748 0 View
Hi, I need to prepare a standard curve of H2O2 to evaluate the primary products of oxidation. H2O2 I have is 35%. How do I prepare a stock of H2O2 10 microlitere. If s.o has experience, I would be...
26 July 2024 3,460 2 View
It has been long known that EDC carbodiimide and NHS easter's half life agains hydrolysis are highly related to pH. However, very surprisingly, not yet found a paper giving a table/chart of their...
25 July 2024 8,738 0 View
I know the difference between instrumental LOD and method LOD but my query is - in case of any sample whose concentration is zero or not detected by the instrumental LOD, is it possible to get...
24 July 2024 6,592 5 View
I run mechanochemical reactions that involves the use of a large amount of catalyst (1:1 molar ratio to the reactant). When I try to understand the effect of amount of catalyst on the reaction, I...
23 July 2024 9,938 1 View