Determination of Hydrazine in Wastewater: Precision Measurement and Environmental Management

Why Determination of Hydrazine in Wastewater?

What is Hydrazine?

Hydrazine is widely used in thermal engineering as an anticorrosive agent. When protecting and passivating equipment, a large amount of wastewater containing a high concentration of hydrazine (about 100 ^mg/dm3) is formed after chemical cleaning. Since it is a highly toxic substance of hazard class II, the discharge of such water directly into the sewerage head and natural reservoirs is prohibited.

The maximum permissible concentration of hydrazine in domestic water is 0.01 ^mg/dm3 and 0.00025 ^mg/dm3 for fish ponds. The amount of hydrazine in wastewater should be reduced to the required levels before discharge. In order to determine these situations, “Hydrazine Determination” is performed in wastewater before discharge. With this analysis process, the amount of hydrazine in the water can be determined and the discharge process can be started after the necessary neutralization process.

ASTM D1385: Standard Test Method for Hydrazine in Water

Methods for Determination of Hydrazine in Wastewater

There are several common analysis methods for the determination of hydrazine in wastewater:

1. Acidic Permanganate Method (APM): Hydrazine in wastewater is oxidized by reacting with potassium permanganate in acidic environments. The oxidized products formed as a result of this reaction are measured spectrophotometrically. The wastewater sample is added to an acidic solution and potassium permanganate is added. The amount of hydrazine is determined by measuring the color change after the reaction.
2. Chromatographic Methods (GC and HPLC): Hydrazine and other compounds are separated and their amounts are calculated by gas chromatography or liquid chromatography. The wastewater sample is analyzed in these devices and hydrazine concentration is determined.
3. Potentiometric Method (Double Electrode Method): The concentration of hydrazine ions in the wastewater sample is measured directly using a hydrazine electrode. An electrode is placed on the sample and electrochemical measurement is performed. This electrode reacts the hydrazine ions to generate a signal.
4. Titrimetric Method (Methylene Blue Titration): Hydrazine in wastewater reacts with methylene blue, resulting in a color change. The wastewater sample is treated with a solvent and then titrated. The amount of hydrazine is calculated as a result of the reaction.

Nanolab Laboratories Group continues to provide services within the scope of Hydrazine Determination in Wastewater. We also provide services in Sea Water Analysis.

Contact us for more information.

You can follow us on LinkedIn for up-to-date news and posts about our services.

Follow our Instagram account to be informed about our latest blog posts.