Limits of detection (LOD) and limits of quantification (LOQ) for mercury species were estimated. To calculate LOD and LOQ, the standard deviation of the base line and the chromatographic peak base of each analyte (SDBLANK), multiplied by 3 or 10 (LOD and LOQ, respectively), were interpolated in the slope of the height calibration curve (Iba~nez-Palomino, Lopez-Sanchez, & Sahuquillo, 2012b), which is expressed as: LOD ¼ 3 SDBLANK/slope; LOQ ¼ 10 SDBLANK slope. The instrument limits were converted to sample limits by multiplying by the extraction dilution factor. The LODs were 0.0003 and 0.0004 mg Hg kg1 for MeHgþ and iHg, respectively. The LOQs were 0.0010 and 0.0012 mg Hg kg1 for MeHgþ and iHg, respectively.
Limits of detection (LOD) and limits of quantification (LOQ) for mercury species were estimated. To calculate LOD and LOQ, the standard deviation of the base line and the chromatographic peak base of each analyte (SDBLANK), multiplied by 3 or 10 (LOD and LOQ, respectively), were interpolated in the slope of the height calibration curve (Iba~nez-Palomino, Lopez-Sanchez, & Sahuquillo, 2012b), which is expressed as: LOD ¼ 3 SDBLANK/slope; LOQ ¼ 10 SDBLANK slope. The instrument limits were converted to sample limits by multiplying by the extraction dilution factor. The LODs were 0.0003 and 0.0004 mg Hg kg1 for MeHgþ and iHg, respectively. The LOQs were 0.0010 and 0.0012 mg Hg kg1 for MeHgþ and iHg, respectively.
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