Forough Karami

8 Questions 2 Answers 0 Followers

Questions related from Forough Karami

If Purospher STAR RP-18 LiChroCART (HPLC column) is suitable for amino acids?

Hi Dear Researchers, Could anyone please provide me with some information about the HPLC column, specifically the “Purospher STAR RP-18 LiChroCART Cartridge”? I would like to know if it is...

26 June 2024 9,384 1 View

What is the reason of negative response in 3D plots of Central Composite Design?

I used Central Composite Design to optimize effective factors for a typical determination. Now, as shown in attached Figure, in 3D response surface plots, response (peak area) is started from...

02 April 2022 8,640 0 View

What is curtain gas in LC-MS technique?

is collision gas is the same with curtain gas in LC-MS technique? and as a whole what is curtain gas in LC-MS?

23 January 2019 3,189 5 View

What is the meaning of LOD (limit of detection) if it is higher than the lowest point in calibration curve?

I calculated LOD based on this formula: 3 SD of blank/slope and the lowest concentration of calibration curve is 0.1. But theoretical LOD is 0.4 and is higher than 0.1. what is the meaning of...

07 January 2019 8,396 7 View

Does anyone guide me for interpretation of peaks in two dimensional gas chromatography?

How can I interpret chromatograms in two dimensional gas chromatography?

31 May 2017 3,384 3 View

Is it possible to analyze an aqua sample with GC/MS?

I want to know is it possible to inject a sample, that have water to GC/MS?

22 February 2015 9,358 12 View

Why is our calibration curve in some methods polynomial?

The equation is not linear.

26 October 2013 2,517 2 View

Central Composite Design (CCD)

I used Central Composite Design to optimize effective factors for a typical determination. Now, as shown in the attached Figure, in 3D response surface plots, response (peak area) is started from...

01 January 1970 2,134 0 View