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. Samples without chlorine residuals must be analyzed by the lab within 48 hours of collection.