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Manufacturer of STP, ETP, Industrial RO, Sewage treatment plant in noida, delhi call-9650608473
Sewage treatment plant in noida,ETP, Industrial RO delhi call-9650608473

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how to measure nitrogen in water, how to measure nitrogen in soil, how to measure nitrogen dioxide

How to measure Nitrate Nitrogen in water or wastewater?

There are three ways for determining nitrate nitrogen in waters and wastewaters:

a) Cadmium reduction method,

b) Chromotropic acid method, and

 c) Devarda’s alloy reduction method.

The cadmium reduction technique is appropriate for concentrations less than 0.1 mg per litre of nitrate nitrogen,

The chromotropic acid technique may be used for concentrations ranging from 0.1 to 5.0 mg/l,

Whereas, Devarda's alloy reduction method can be utilized for quantities more than 2 mg/l of total nitrogen.

1: Cadmium Reduction Method

Principle of Cadmium Reduction Method - In the presence of cadmium, nitrate is converted to nitrite. The nitrite generated is quantified calorimetrically after di-azotizing with sulphanilamide and combining with N-1 naphthyl ethylenediamine to make a strongly coloured azo dye.

Interference - High concentrations of copper, iron, and other metals reduce reduction efficiency. To eliminate this interference, use EDTA.Oil and grease can also interfere, as might leftover chlorine. Remove oil and grease with organic solvents, and residual chlorine with sodium thiosulphate.

2: Method of Chromotropic Acid

Two moles of nitrate nitrogen react with one mole of chromotropic acid to produce a yellow reaction product with maximum absorbance at 410 nm.

Interferences - With chromotropic acid, residual chlorine, some oxidants, and nitrites produce a yellow colour. Sulphite is used to reduce interference from residual chlorine and oxidants. Nitrites are converted to nitrogen gas by urea.

3: Devarda’s Alloy Reduction Method

Principle - Nitrate and nitrite are reduced to ammonia in the presence of a reducing agent (Devarda's alloy) under hot alkaline circumstances. The generated ammonia distils and is caught in a boric acid-containing receiving flask. Direct nesslerization or acidimetric analysis can be used to determine ammonia. This approach is suggested for nitrate and nitrite nitrogen.

Preliminary distillation will be used to eliminate ammonia from the sample. This process also converts nitrite to ammonia. As a consequence, nitrite is determined separately and the result is subtracted. This approach is not suggested for nitrate nitrogen levels less than 2 mg/l.

How to measure Nitrite Nitrogen in India?

A technique for determining nitrite nitrogen using Nessler's cylinders or a spectrophotometer is prescribed. The referee method should be the spectrophotometric method.

Indian Standard Specification for Nitrogen

Under IS Code No. 3025: Part 34, nitrogen and other associate compounds are calculated for wastewater.

What do we have to offer?

The World Health Organization as well as BIS specifies the standard values for Nitrogenous compounds before disposing the wastewater of in the surface or inland waters. As STP/ETP/WWTP/WTP manufacturers, we can provide you with expert solution and design the best suited treatment plant as per your needs.

Netsol Water is Greater Noida-based leading water & wastewater treatment plant manufacturer. We are industry's most demanding company based on client review and work quality. We are known as best commercial RO plant manufacturers, industrial RO plant manufacturer, sewage treatment plant manufacturer, Water Softener Plant Manufacturers and effluent treatment plant manufacturers. Apart from this 24x7 customer support is our USP. Call on +91-9650608473, or write us at enquiry@netsolwater.com for any support, inquiry or product-purchase related query.

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