https://drive.google.com/file/d/1NND44XhcGXlNG40k3pzD3wrp3AEaknfp/view?usp=drivesdk

 

 

https://docs.google.com/presentation/d/1OCVUHjAcQde2l6KuCW8k_GqMiG6BnR-3/edit?usp=drivesdk&ouid=110689844555908193677&rtpof=true&sd=true

 

Explanation  of Lesson no.9 in the practical instrumental analysis course during corona period ( 2020 - 2021)   , E- Learning for students