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. 2012 Nov 22;2:856. doi: 10.1038/srep00856

Figure 4. Relationship between actual and predicted estrone-3-glucuronide (E1G) concentrations by partial least square regression (PLSR) of the absorbance values of E1G standard spectra at the water matrix coordinates (WAMACs).

Figure 4

Actual E1G concentrations (125–2000 pg/ml) were transformed into decadic logarithm values (2.1–3.3) and these values were used for PLSR as reference values. Each point shows an E1G standard spectrum.