Hi,

I have a question about the 0.5 McFarland standard. In different websites I read that the for the 0.5 McFarland standard, the absorbance at a wavelength of 625 nm should be 0.08 to 0.13. I can't find a reference to a paper reporting this statement . Do you know where I can find it?

Thank you very much.

Silvia

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