How to draw control chart?

As per SO 17025 / 2017 requirements to ensure the validity of results and to monitor the stability and efficiency of your method to analyze target analytes over a period of time

[@omaryehya7935]

many thanks Dr Mahmoud,
and Upward Upward

[@AccreditedLaboratory]

جزاك الله خيرًا

[@mahmoudmoustafa550]

Thanks for your new video and it will be highly appreciated to support your future theoretical explanation with these examples that you did.
And as I mentioned before in Uncertainty videos if you have a chart like this for the uncertainty measurements , please share it for us.

[@AccreditedLaboratory]

Sure inshaalah I will not keep anything. Is that example help?

[@fanfektube4989]

good

[@neetabenblad7280]

Its really helpful.. Thank you for video..measurement uncertainty ka bhi video bnaeye..

[@AccreditedLaboratory]

Thank you, this is uncertainty playlist
czcams.com/play/PLyMlCjuRlnXExllF3CG4S1yXFIeJzPADJ.html

[@omaryehya7935]

Salam alekom Dr
Good effort,
Asking about the minimum number of analyses to Drew the chart, can be 20:30 analyses according to EPA 200.7 or 10 analyses is enough?
Just if I have an assessor and he asked me according what u select 10 or 20 analyses to build the chart??
Appreciated and best regards

[@AccreditedLaboratory]

You should follow the guideline you use for validation

[@fanfektube4989]

Can we do with out spike? i.e only the sample can run.......
eg. aflatoxin for feed sample

[@AccreditedLaboratory]

No, you must use a spike sample with known conc or CRM

[@fathiafarag944]

Dear dr mahmoud ,I hope to be fine
Please can help me to construct R chart where I want know the control limits of R chart

[@AccreditedLaboratory]

If you can go to Facebook page, I will send you the criteria

[@AccreditedLaboratory]

Quality control samples lecture czcams.com/video/CnPJO3lur6Q/video.html

[@azzaawad4883]

اشرح بالعربى

[@AccreditedLaboratory]

فيه كتير جدًا بالعربي عندي