Thank you , you are really helped me to solve my home work .
@mariaignaciamezacerda98344 жыл бұрын
Hi. Thanks for the explanation. Can U tell us the source of the formula for LOQ and LOD? a paper or book? Thanks
@norouziparviz80855 жыл бұрын
Hi, there is a problem here, when LOQ is 6.9, is it possible to measure concentration 2.6? (which is the first point of the calibration curve ( or linear range)).
@chemist_isi5 жыл бұрын
That is why, after lab analysis, we must do Quality control of the analytical method.
@قائدبكرعلي Жыл бұрын
Thank you
@marvincearaneta93894 жыл бұрын
Hii! Thanks for the help. Can I ask for the source of the formulas like probably a journal? Thankiess
@qiuyinrui93053 жыл бұрын
but what if we change to another series of standard points - it would be another value of DL and DQ umh? even just simply add or minus points can lead to a change of N, like one comment referred - is there any notice or rules we usually choose what range of concentrations as our data sources?
@jeanniedevereaux58573 жыл бұрын
Thank you very much
@gumball6653 жыл бұрын
thank uu
@splekort3 жыл бұрын
Hello. Your estimation included the intercept and the slope, so why you did not use 2 degrees of freedom? Or when should 2 degrees of freedom be used?
@dr.brijdablain90033 жыл бұрын
Very informative, can you help us to calculate all this using ORIGIN
@jiahuizhao99656 жыл бұрын
Excuse me, I have a question about the SD of intercept and SE of intercept, why SD =SE*√N.Shouldn't we calculate LOD/LOQ directly by using the results of regression? Hope for your reply, thank you so much.
@jiahuizhao99656 жыл бұрын
Yeah, I'm the first time to hear about this one.Do you usually use GC/HPLC?
@chemist_isi6 жыл бұрын
Thanks for the question. Yes, we don't need SD for the calculation LOD and LOQ. But when we are preparing QC validation of the analytical method, at that time we need SD. It is for information only. You can check the video, kzbin.info/www/bejne/rIK5dIBvm8eSp5o
@chemist_isi6 жыл бұрын
Ye of course I am using GC and HPLC systems :)
@malakmohamed43465 жыл бұрын
thank you for the information
@seanlim51444 жыл бұрын
you save my day
@etcbs41132 жыл бұрын
Is R2 could be equal 1?
@kirenkoalex76685 жыл бұрын
What for do we use square root from N? In this case the higher is N the higher LOD value is too. But the more points (levels) we have the more precise data and the lower LOD must be.
@iosonosenzanome3 ай бұрын
because from SE to SD you have to multiply for this factor
@nassimalijani8269 Жыл бұрын
Hi. Thank you so much. May I have that word file containing formula for calculations please?
@hassanzia41392 жыл бұрын
Can you guide how LoD and LoQ will be calculated for metals and metal oxides by Fluorescence
@헤헹-f1j5 жыл бұрын
Thank u so much!!
@aishwaryasingh70755 жыл бұрын
what will be unit for LOD and LOQ
@chemist_isi5 жыл бұрын
It depends on the method. Which unit you are using, it will be the same.
@LucianLusilver4 жыл бұрын
If we have two analytes in a mixture, does that mean we do two separate calculations of these? Sorry if my question sounds redundant.
@punchymuffin64023 жыл бұрын
The LOD and LOQ you calculated here will have the same units as values in the x column, right? If your concentration units are ng/mL, then are the LOD and LOQ calculated in ng/mL too? You don't have to plug the values obtained for LOD and LOQ back into the equation for the line and solve for x do you?
@gugagi296 жыл бұрын
Really helpful.Thanks!!
@chemist_isi6 жыл бұрын
It is pleasure for me
@chemist_isi6 жыл бұрын
@อมรรัตน์ รัตนบุรี Could you please check below video: kzbin.info/www/bejne/rIK5dIBvm8eSp5o Quality control of the analytical method control
@toasterspoon50004 жыл бұрын
hello, I was hoping if you can add audio of a walk through.
@krish_krish3546 жыл бұрын
Show slowly the function u click. Not able to follow for beginners.
@chemist_isi6 жыл бұрын
Ok
@chemist_isi6 жыл бұрын
Check this video kzbin.info/www/bejne/nYWknGuegZ53Y6M