How can I calculate LOQ (limit of quantification) for repeated values with known concentrations?

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Mahasampath Gowri

they are giving it as limit of detection and blank.. Please refer the following link for calculation

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2556583/pdf/cbr29_s_pgs49.pdf

Karthikeyan Ramanujam

Thanks Gowri,

But here I do not have blank sample values and I have tried slope and SD method using calibration curve.But still I am not sure on the results.