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MAT-CS Home Cover

ASTM D3867

ASTM D3867 – Standard Test Methods for Nitrite-Nitrate in Water

Description:

Significance and Use

5.1 Both test methods use identical reagents and sample processing. The only difference between the two methods is that one test method is automated and the other is manual. The ranges and interferences are identical.

5.2 The automated test method is preferred when large numbers of samples are to be analyzed. The manual test method is used for fewer samples or when automated instrumentation is not available.

5.3 These test methods replace Test Methods D1254 (Nitrite) and D992 (Nitrate). The nitrite test method (Test Method D1254) used a reagent that is considered to be a potential carcinogen. The nitrate test method (Test Method D992) has been shown to have relatively large errors when used in wastewaters and also has greater manipulative difficulties than the test method described herein.

5.4 Test Method D7781 uses a nitrate reductase enzyme for the reduction of nitrate to nitrite. Cadmium is considered a toxic metal. Also, the heterogeneous cadmium reductant creates greater difficulty than the reduction described in this test method.

Scope

1.1 These test methods cover the determination of nitrite nitrogen, nitrate nitrogen, and combined nitrite-nitrate nitrogen in water and wastewater in the range from 0.05 to 1.0 mg/L nitrogen. Two test methods2 are given as follows:

 Sections
Test Method A—Automated Cadmium Reduction 9 to 18
Test Method B—Manual Cadmium Reduction19 to 28

1.2 These test methods are applicable to surface, saline, waste, and ground waters. It is the user’s responsibility to ensure the validity of these test methods for waters of untested matrices.

1.3 The values stated in either SI or inch-pound units are to be regarded as the standard. No other units of measurement are included in this standard.

Related Test Methods

ASTM D483

ASTM D4829

ASTM D4828

ASTM D4824

ASTM D482

ASTM D4815

ASTM D4814

ASTM D4812

ASTM D4811

ASTM D4810

ASTM D4809

ASTM D4808

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