What is Signal to Noise Ratio and How to Calculate it?

Signal to Noise ratio is used to establish method's sensitivity or to evaluate LOD & LOQ
Let us understand how one can calculate S/N as per USP or EP
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[@elielphy]

Very Nice ! ! ! ! ! Muito Obrigado... from Brazil

[@mdb_1946]

Easy to understand.. thanks

[@pptripathi4972]

Nice informative vedio

[@birenpatel2801]

Thank you very much

[@dhanajighadage6240]

Tnanks sir

[@babupatel3168]

sir how to do in empower
noise to be consider from sample run only or from blank

[@Aaakashkaushik]

Sir make videos in hindi also

[@gopalgirase-01]

And what is limit of LOD and LOQ according to S/N ratio.

[@bachelorcookings1466]

LOD not lessthan 3
LOQ not less than 10

[@gopalgirase-01]

But sir why we need to calculate S/N ratio?

[@diego39500]

It iss needed in order to calculate the LOD and LOQ. Also its good to understand how the system is performing with certain compounds.

[@gopalgirase-01]

@@diego39500 But what is LOD and LOQ?How to calculate?

[@diego39500]

@@gopalgirase-01 lod is limit.of detection, how low can your system detect there is something. And Loq is the limit of quatitation. Lod might be 3 times the SD of spike blanks. And loq is 3.3 times the lod