How To Determine Detection Limit (LoD) and Quantitation Limit (LoQ)
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- เผยแพร่เมื่อ 14 ม.ค. 2022
- Determination of LoD & LoQ
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Your explanation is very powerful and easily understand by anyone. Appreciate.
ur explanation was amazing and crystal clear, keep making the lectures to enrich knowledge
Great sir,your explanation is very versatile 👌, useful for us.
It was very informative & useful information and you explained ina detail so anyone can understand, Great ..Help
Thank you sir, Highly informative. Please put video for gradient method development in HPLC
Highly informative sir 👍🙏
Very Informative lecture😍
dear sir, thanks for the superb explanation. Where i can get this formula for residual calculations? Which regulatory document mentions the formula for residual calculations? I am unable to find out the regulatory reference for this calculation.
Which concentrations need to be selected while determine the lod and loq?can we go below 1 ppm too in the given example...
When do you use the SD of the Y- intercept vs SS of regression line to find LOD?
Is there need of seprate calibration curves for QL and DL.
Sir please made a video for set the LOQ limit for 2 to 5 impurity present in sample having different uv
Please made all clear about the method validation with the example it will be helpful for us
Great efforts
Thank you so much. I need some clarity, when I iniect blank, I will get very more than 1 peak response. I may have 2 to 5 areas, who can I handle that???. So if IAM looking at the impurities in my sample but when there is no impirity, no peak for impurity. How do I handle this?
Thank you very much.
Very helpful sir, can we have a video about impurity method validation from protocol preparation to report generation?
Yes sir
Thank you👏🏼👏🏼👏🏼
Thank you so much sir
Hello sir... according to ich guidelines loq value considered maximum 50% of our spec limit if our loq not stablish 50% or below spec limit than what will be do...??
Please suggest me sir...and explain what is the reason not stablish loq below 50%..
Salam.
Sometimes I find in the articles quoting 3 SDV/b, sometimes 3.3 SDV/b, which formula is taken in general that of 3 or that of 3.3.
what's the difference?
Hi sir
Why In visual observation LOQ not determined .
Ple send the answer
How can I determine slope I'm Excel?
What if the specification limit is below to the quantification limit then is that LOQ is valid?
You made video on related substances
In case of AAS atomic absorption spectroscopy
The linearity start from 0.1 ppm to 0.5 ppm (LOD)
and the concentration fall below the 0.1 i.e 0.023 then
What will be the result?
Should we calculate this or not
If not then what will be the result?
If anyone have answer
Plz let me know
Why we determined lod and loq??
Actual value and predictable value explain with another one more example in visible manner
Sir what is maximum limit of impurity
Why the number 3 comes in the formula for LOD?
Sir ur expalnation is very good but ihave a one doubt for blank mesurement method
1. We are inject blank solution or placebo 60 mesurements but the solutions not present in our analyte then how integrate peak and caliculate sddeviation
The response may be expected due to detector background noise and diluent or matrix effect...
TQ Sir..
can we get the PPT PDF plz
Super sir
can i get it in pdf
Seperate curve for detection limit in that LOQ should not be added other linearity level can be added. Is it so
Slope can be better evaluated with a calibration curve comprising higher concentrations and LOQ conc need not be considered in it.
@@pharmagrowthhub3083 thank you sir
Tanks
Hello Sir I got confused with how to compute the residuals especially the predictable response which you mentioned (mx + c). Kindly explain in detailed. And thank you in advance if you will notice my comment and query.
Residual formula: Observed Area - Predicted area
Predicted area shall be calculated from the Regression curve
Y=MX+C
Example: the obtained area for the below conc. is stated below
1ppm - 400
2ppm - 800
3ppm - 1189
4 ppm - 1600
5 ppm - 1985
NOw plot a linearity plot to obtained ur regression equation.
y = 397x + 3.8
from the above ontained value, now will calculate the residuals as stated below for 1ppm level:
Y=397 (1)+3.8
Y=397+3.8
Y=400.8
So your residual is (Practical obtained area - predicted area from the regression line)
Residual = 400 - 400.8
Residual = - 0.8
SO the observed residual for 1 ppm is -0.8. similarly the residual for other concentrations will be caluculated in the same way.
Hope u got the answer.
@@rajeshgoud1274 why we are using y= 397x +3.8 ?? Plz let me know the ans
What is the real formula?
Send me excel sheet sir plz.
hi Can you explain more about how to ca the calculate the residuals, I'm confused about the formula
Sir please make a vidio in hindi language for better understanding.then will be more grow your channel and views and gain subscribers.
10.35 minutes can u explain a little elaborate with other example
you are not tell residual actual calculations properly