Measurement of Nitrate by Ion Selective Electrode (CAT#: STEM-ACT-0102-WXH)

Introduction

Nitrate is a polyatomic ion with the chemical formula NO3-. Salts containing this ion are called nitrates. Nitrates are common components of fertilizers and explosives. Almost all inorganic nitrates are soluble in water. An example of an insoluble nitrate is bismuth oxynitrate.
Nitrates are used as fertilizers in agriculture because of their high solubility and biodegradability. The main nitrate fertilizers are ammonium, sodium, potassium, calcium, and magnesium salts. Several billion kilograms are produced annually for this purpose.

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Principle Applications Procedure Materials Notes Related Products

Principle

An ideal ion-selective electrode (I.S.E.) consists of a thin membrane across which only the intended ion can be transported. The transport of ions from a high conc. to a low one through a selective binding with some sites within the membrane creates a potential difference.

Applications

• Used for the potentiometric determination of several anions (fluoride, chloride, bromide, iodide ion) and cations (sodium, potassium, calcium ion).
• Used for endpoint detection in potentiometric titration.
• In biochemistry, ion selective electrodes are used for the determination of enzymes and substances which interact with enzymes.

Procedure

1. Preparation of Standards
2. Instrument Setup and Operation
3. Analysis of sample

Materials

Ion Selective Electrode

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