Is there a way to check the accuracy of an ammonia method?

Document ID

Document ID TE150

Published Date

Published Date 25/01/2018
Question
Is there a way to check the accuracy of an ammonia method?
Summary
Using standards to verify the accuracy of nitrogen-ammonia methods
Answer
Each nitrogen-ammonia methods have an accuracy check section. This section explains how to use primary standard solutions to confirm the accuracy of the ammonia results. The standard additions method is helpful to test the sample for interfering substances. The standard solutions method uses the standard solution in place of the sample.

Provided below are a list of nitrogen-ammonia standard solutions:

• Nitrogen-Ammonia Standard Solution - 1 mg/L NH3-N 500 mL Catalog Number 189149
• Nitrogen- Ammonia Standard Solution - 10 mg/L NH3-N 500mL Catalog Number 15349
• Nitrogen-Ammonia Standard Solution - 50 mg/L NH3-N, 16pk 10mL Voluette Ampule Catalog Number 1479110
• Nitrogen-Ammonia Standard Solution - 50 mg/L NH3-N, 20pk 2mL PourRite Ampule Catalog Number 1479120
• Nitrogen-Ammonia Standard Solution - 100 mg/L NH3-N 500mL Catalog Number 2406549
• Nitrogen-Ammonia Standard Solution - 150 mg/L NH3-N, 16pk 10mL Voluette Ampule Catalog Number 2128410
• Nitrogen-Ammonia Standard Solution - 160 mg/L NH3-N, 16pk 10mL Voluette Ampule Catalog Number 2109110
• Nitrogen-Ammonia Standard Solution - 1000 mg/L NH3-N 1L Catalog Number 2354153

Reference the Water Analysis Handbook (WAH) Document: Chemical Analysis, section 3.2, for more information on checking for Accuracy and Precision.