Laboratory DQOs
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 |