Nitrate – Drinking water
Laboratory Fee Schedule
Group: Inorganic
Procedure #: EZZ0048A
| Synonym(s): | Nitrate as nitrogen in potable water |
|---|---|
| Requisition Form | G-22 |
| Test Description | The determination of nitrate in drinking water samples. |
| Pre-Approval Needed | N/A |
| Supplemental Information Required | N/A |
| Supplemental Form(s) | N/A |
| Performed on Specimens from (sources) | Environmental |
| Sample/Specimen Type for Testing | Drinking water |
| Minimum Volume/Size Required | 100 mL |
| Storage/Preservation Prior to Shipping | • Store in hard or soft plastic or glass container. • Measure and record the chlorine residual. • Maintain sample at 4.0°C. • Some headspace is allowed. |
| Transport Medium | N/A |
| Specimen Labeling | Sample identification must match submission form. |
| Shipping and Specimen Handling Requirements | • Samples without chlorine residuals must be tested by laboratory within 48 hours of collection. • Ship according to Dangerous Goods Regulations, IATA, and/or CFR 49. |
| Method | Automated colorimetry (EPA method 353.2) |
| Turn-around Time | N/A |
| Interferences/Limitations | Some known interferences are as follows: • residual chlorine; • high concentrations of iron, copper, or other metals; • high concentrations of oil or grease; and • excessive turbidity. |
| Common Causes for Rejection | • Insufficient quantity • unacceptable specimen type or source • improper shipping conditions • expired media or collection container • discrepancies between specimen label and submission form • incomplete or missing submission form |
| Additional Information |
• Samples with chlorine residuals must be analyzed by the lab within 14 days of collection. |