AB-070

Polarographic determination of nitrate in water samples, soil and plant extracts, vegetable juices, meat and sausages, fertilizers, liquid manure, etc.

Summary

The photometric determination of nitrate is limited by the fact that the respective methods (salicylic acid, brucine, 2,6-dimethyl phenol, Nesslers reagent after reduction of nitrate to ammonium) are subject to interferences. The direct potentiometric determination using an ion-selective nitrate electrode causes problems in the presence of fairly large amounts of chloride or organic compounds with carboxyl groups. The polarographic method, on the other hand, is not only more rapid, but also practically insensitive to chemical interference, thus ensuring more accurate results. The limit of quantification depends on the matrix of the sample and is approximately 1 mg/L.

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Metrohm Korea Ltd.

서울특별시 송파구 정의로 8길, 9, 5층 (AJ 본관)
05836

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// Water – seawater// Plant biomass// Water – process water// Water – drinking water, tap water// Food – sweets// Food – animal sources// Water – power plant water// Beverages – nonalcoholic// Soil, sediment, rocks// Biological substances// Water – wastewater// Water – others// Pesticides, fertilizers// Water – ultrapure water (UPW)

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