LABORATORY PERFORMANCE EVALUATION STANDARDS
Cost-effective quality control standards to monitor daily laboratory performance, build control charts, and detect instrument drift or technician variation before it affects results.
Catalog & Certified Values
Round Robin certified consensus values. 95% confidence intervals included for each level.
| Level | Parameter | Consensus Value | Unit | Confidence Interval | Catalog No. |
|---|---|---|---|---|---|
| L1 | Suspended Solids | 238 | mg/L | 235-242 | 140-702-101 |
| L1 | Dissolved Solids | 33 | mg/L | 18.7-47.3 | 140-702-101 |
| L1 | Total Solids | 254 | mg/L | 242-267 | 140-702-101 |
| L2 | Suspended Solids | 380 | mg/L | 374-385 | 140-702-102 |
| L2 | Dissolved Solids | 44.8 | mg/L | 21.3-68.3 | 140-702-102 |
| L2 | Total Solids | 400 | mg/L | 380-419 | 140-702-102 |
| L3 | Suspended Solids | 1928 | mg/L | 1895-1961 | 140-702-103 |
| L3 | Dissolved Solids | 46 | mg/L | 25.3-66.8 | 140-702-103 |
| L3 | Total Solids | 1970 | mg/L | 1942-1999 | 140-702-103 |
Round Robin certified — consensus values from 50+ laboratory results.
| Level | Parameter | Consensus Value | Unit | Range | Catalog No. |
|---|---|---|---|---|---|
| L1 | Ammonia (as N) | 0.97 | mg/L | Low | 140-701-101 |
| L1 | Nitrate (as N) | 1.4 | mg/L | Low | 140-701-101 |
| L1 | Orthophosphate (as P) | 0.74 | mg/L | Low | 140-701-101 |
| L2 | Ammonia (as N) | 8.59 | mg/L | Medium | 140-701-102 |
| L2 | Nitrate (as N) | 13.3 | mg/L | Medium | 140-701-102 |
| L2 | Orthophosphate (as P) | 4.42 | mg/L | Medium | 140-701-102 |
| L3 | Ammonia (as N) | 14.7 | mg/L | High | 140-701-103 |
| L3 | Nitrate (as N) | 26.5 | mg/L | High | 140-701-103 |
| L3 | Orthophosphate (as P) | 9.33 | mg/L | High | 140-701-103 |
Ammonia, nitrate and orthophosphate water quality QC standard. Round Robin certified.
Applications
FAQ
peCheck standards are specifically designed for performance evaluation and control chart construction, with Round Robin consensus values. AccuSPeC covers a broader range of calibration and verification applications. Both series can be used for daily QC.
A minimum of 20 results is recommended to calculate a reliable mean and standard deviation for a Shewhart control chart. This typically takes 4–6 weeks to accumulate. Rebuild the chart after major instrument maintenance or significant method changes.
High-throughput labs should run a QC check at the start of every analytical batch (daily). Moderate-use labs are typically adequate with weekly use. Follow the frequency specified in your laboratory quality manual for accreditation compliance.
Quote & Info
Contact our technical team for pre-sales consultation or pricing. Over 25 years of expertise.
