Linear calibrations in chromatography: the incorrect use of ordinary least squares for determinations at low levels, and the need to redefine the limit of quantification with this regression model.
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DOI: 10.1002/jssc.202000094
Abstract: Ordinary least squares is widely applied as the standard regression method for analytical calibrations, and it is usually accepted that this regression method can be used for quantification starting at the limit of quantification. However,… read more here.
Keywords: limit quantification; ordinary least; least squares; low levels ... See more keywords
Hypocretin-1 measurements in cerebrospinal fluid using radioimmunoassay: within and between assay reliability and limit of quantification
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DOI: 10.1093/sleep/zsac103
Abstract: Abstract Study Objectives The most sensitive and specific investigative method for the diagnosis of narcolepsy type 1 (NT1) is the determination of hypocretin-1 (orexin-A) deficiency (≤110 pg/mL) in cerebrospinal fluid using a radioimmunoassay (RIA). We… read more here.
Keywords: limit quantification; hypocretin; fluid using; reliability ... See more keywords