Science Center Objects

The OMRL monitors laboratory performance though the use of QC data. Our laboratory QC data is reviewed daily and compiled in a manner that allows reviewers to compare the QC results to the Data Quality Objectives (DQOs) listed here.

Matrix Analyte common name Laboratory Data Quality Objectives
Precision Accuracy
Analyte MDL Analyte LRL Analytical Replicate RPD Calibration SRM/CRM CCV LFMS
Water (filtered) DOC 0.15 mg/L 0.3 mg/L < 5%, every 10 samples R2>0.995 90-110% of SRM (Caffeine), 1 of every 20 samples 95-105% recovery, 1 every 10 analyses 80-120% recovery of matrix spike, 1 every 20 analyses
Water (filtered) DIC 0.5 mg/L 1.0 mg/L < 5%, every 10 samples R2>0.995 90-110% of SRM (Caffeine), 1 of every 20 samples 95-105% recovery, 1 every 10 analyses 80-120% recovery of matrix spike, 1 every 20 analyses
Water (filtered) TDN 0.07 mg/L 0.15 mg/L < 5%, every 10 samples R2>0.995 90-110% of SRM (Caffeine), 1 every 20 samples 95-105% recovery, 1 every 10 analyses 80-120% recovery of matrix spike, 1 every 20 analyses
Water (filtered) DOM Absorbance (200-750nm) 0.01 AU at 250 nm to 0.001 AU at 800 nm NA <5% NA 80-110% of SRM tea NA NA
Water (filtered) DOM Fluroescence (Ex200-Ex800, Em250-Em800) Varies by ex-em pair. Ranges from 0.004 RU (VIS) to 0.1 RU (UV) NA <5% NA 80-110% of SRM tea NA NA
Water (unfiltered) SPM 1 mg/L (1L vol) 3 mg/L <10% variable based on volume NA blank filters NA NA