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7- Accuracy and precision || Repeatability and reproducibility 

Dr.Abdelkhabeer
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1- Accuracy, trueness and precision
2- Difference between accuracy and trueness
3- Relation between systematic and random errors and these parameters
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4- Bias calculation
5- Repeatability and reproducibility

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9 сен 2024

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Комментарии : 31   
@maimamaalem3751
@maimamaalem3751 3 года назад
الف مبروك على الدكتوراه و انشالله المزيد من النجاحات و عقبالنا يا رب.. فرحانة بعودتك تحية من الجزائر اتمنى لو يكون فيه محاضرة عن GC/MS
@AccreditedLaboratory
@AccreditedLaboratory 3 года назад
الله يبارك فيكي يارب شكرًا يارب عقبالك إن شاء الله
@grinefarouk1933
@grinefarouk1933 2 года назад
Congratulations. I'm a metrology engineer from algeria.your videos are really helpfull.
@AccreditedLaboratory
@AccreditedLaboratory 2 года назад
Thank you so much brother
@user-zp1ie7yc7d
@user-zp1ie7yc7d Год назад
جزاك الله خيرا
@AccreditedLaboratory
@AccreditedLaboratory Год назад
جزانا وإياكم كل خير
@ayhanj.b8618
@ayhanj.b8618 3 года назад
ربي يوفقك
@AccreditedLaboratory
@AccreditedLaboratory 3 года назад
آمين يارب وإياكم
@alishaib796
@alishaib796 2 года назад
شرح راقي جدا جدا جدا
@AccreditedLaboratory
@AccreditedLaboratory 2 года назад
جزاك الله خيرًا
@slll2020
@slll2020 Год назад
thank u
@AccreditedLaboratory
@AccreditedLaboratory Год назад
Most welcome 🙏
@shadiahany3710
@shadiahany3710 2 года назад
ممكن الفرق بين انواع ال calibration curve
@AccreditedLaboratory
@AccreditedLaboratory 2 года назад
حاضر ان شاء الله
@amrnasser4732
@amrnasser4732 3 года назад
لو سمحت يادكتور ممكن اسم guidelines اللي بيقول انه pooled presion اقل من ٢٠ %. انا او ماعنديش reference في الحاله ازاي احدد acceptance criteria
@AccreditedLaboratory
@AccreditedLaboratory 3 года назад
Please check this link page number 11 www.unodc.org/documents/scientific/validation_E.pdf There are also many guidelines saying the same thing. But for if you don’t have reference what to do that will need a lecture to explain
@AccreditedLaboratory
@AccreditedLaboratory 3 года назад
Also that depends on the matrix effect. If there is a high matrix effect, it will be higher
@wmouharam
@wmouharam 2 года назад
thanks Dr mahmoud, for your efforts and congratulations for Phd. but can you specify a guideline with precision limits of about 20%, or any other limits in any guideline ? i searched for that limit in eurachem 2014 but i didn't fine any thing
@AccreditedLaboratory
@AccreditedLaboratory 2 года назад
I will send you inshaallah and you can check also standard method for water
@aymono
@aymono 3 года назад
السلام عليكم ورحمة الله وبركاته جزاكم الله خيرا ومبروك علي الدكتوراه سؤال ، انت شرحت حساب intralab reproducibility بالنسبة لحساب interlab reproducibility هل في طريقه اخري للحساب ؟مع ذكر مثال للتوضيح لو سمحت وهل ممكن لو متاح excel sheet اللي انت شغال عليه كمثال تطبيقي مره ثانيه جزاكم الله خيرا
@AccreditedLaboratory
@AccreditedLaboratory 3 года назад
الله يبارك فيك تمام ان شاء الله هعمل محاضره فيها شرح عالإكسل شيت
@aymenogkush
@aymenogkush 2 года назад
I analyse Aflatoxins in the lab, and I have an old PT (around 50 g as amount), how this amount can be sufficient for 10 replicates, knowing that when I bought the PT sample it was 100 g and I need 25 g as a test sample for the analysis of Aflatoxins. And the same question for CRM, when I wanted to buy a CRM, I found that the packaging only contain 100g, so how can I use this amount for 10 replicates (25g x 10 = 250g, which mean that I need to buy 3 CRMs, it will cost me a lot)
@AccreditedLaboratory
@AccreditedLaboratory 2 года назад
Simple, you don’t need to weight 25gm it’s too much. you can use only 5gm in case of aflatoxins and reduce the extraction solvent to give you the same dilution factor. As ex. If your dilution factor is = 4. So, you will add 5gm sample and 10ml extraction solvent and that will give you the same like if you add 25gm sample to 100ml extraction solvent
@aymenogkush
@aymenogkush 2 года назад
@@AccreditedLaboratory Thank you so much, I had this idea but I need it someone to confirm it to me hhh, and please for the acceptance criteria of 20%, do you think it's applicable also for the aflatoxins? because I do not know from I can have the guidnance to seek for it.
@AccreditedLaboratory
@AccreditedLaboratory 2 года назад
Which 20%, do you mean relative standard deviation
@AccreditedLaboratory
@AccreditedLaboratory 2 года назад
Yes it’s < 20% in case of aflatoxins
@aymenogkush
@aymenogkush 2 года назад
@@AccreditedLaboratory Yes
@safaelfaramawy4812
@safaelfaramawy4812 2 года назад
معلش سؤال بدائي شويه هو ايه الspike samples
@AccreditedLaboratory
@AccreditedLaboratory 2 года назад
مفيش سؤال بدائي دي حاجه مهمه جدًا لازم بتعمليها مع كل sequence اللينك ده فيديو قديم الجودة مش أوي لكن ان شاء الله يكون كافي وإتعودي تسألي أي سؤال من غير خجل لأن كلنا بنتعلم من بعض ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CnPJO3lur6Q.html
@safaelfaramawy4812
@safaelfaramawy4812 2 года назад
@@AccreditedLaboratory هتاخد مني دعوات كتير يا دكتور، ربنا يباركلك انت وضحتلي حاجات مكنتش اتوقع انها تنشرح بالبساطه دي
@AccreditedLaboratory
@AccreditedLaboratory 2 года назад
ربنا يجازيكي خير علي الدعاء والحمدلله
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