Detection limits
The post-column concentration of a compound and not the concentration in the sample. A detector specified to detect a compound at 0.1 ppm may be also acceptable for a method that tests a water sample containing the compound at a much lower concentration. This is because the compound can be concentrated on the column or sample preparation techniques may used to preconcentrate the sample as well.
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[…] (90:10) as the eluent and exhibits decent linearity (r>0.999) from 1.0 to 80 µg/mL with the limit of detection (LOD) 0.1 µg/mL and the limit of quantification (LOQ) 0.2 µg/mL.  The method’s analysis […]