Determination of Hydrazine (ASTM D1385)

In the ASTM D1385 standard developed by the American Testing and Materials Organization (ASTM), in boiler feed waters treated with hydrazine, A test method for the colorimetric determination of hydrazine in natural and well waters is presented.

This test method is used in the hydrazine range of 5.0-200 μg/L (ppb). The range is for photometric measurements made at 50 nm in a 458 mm cell. Higher hydrazine concentrations can also be determined by taking a more diluted sample. It is the users responsibility to ensure the validity of this test method for untested water types.

The full name of this standard is: ASTM D1385-07 (2018) e1 Standard test method for hydrazine in water.

Hydrazine is a man-made chemical and is not found in natural waters. The determination of hydrazine is usually done in boiler feed waters, process waters and other waters that have been treated with hydrazine to preserve residues to prevent corrosion by dissolved oxygen. This reducing chemical reacts with dissolved oxygen to form nitrogen and water. It can also, under certain conditions, decompose to form ammonia and nitrogen.

Hydrazine is a suspected carcinogen and has a threshold limit value of 1.0 mg/L in the atmosphere. When in an aqueous solution, it will soon oxidize to nitrogen and water in the presence of air.

In the tests and analyzes carried out in our organization, which has a wide range of technological equipment, trained and experienced staff and applies the most modern methods, national and international standards and legal regulations in force are complied with. Among the numerous tests performed in this context are hydrazine determination (ASTM D1385) services.