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Related Concept Videos

Amperometry: Overview01:10

Amperometry: Overview

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Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
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In proton NMR spectroscopy, primary amines and secondary amines showcase their N–H protons as a broad signal in the chemical shift range between δ 0.5 and 5 ppm. The exact position in this range depends on several factors, including sample concentration, hydrogen bonding, and the type of solvent used. Since amine protons undergo fast proton exchange in solution, the protons are labile and therefore do not participate in any splitting with adjacent protons. Thus, the observed peak is...
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Amines to Sulfonamides: The Hinsberg Test01:23

Amines to Sulfonamides: The Hinsberg Test

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The Hinsberg test is a method to identify primary, secondary and tertiary amines, named after its pioneer, Oscar Hinsberg. Here, amines are treated with benzenesulfonyl chloride, also known as the Hinsberg reagent, in the presence of an excess of aqueous base, followed by acidification. Based on the nature of the amines, different changes are observed.
Generally, a primary amine reacts with the Hinsberg reagent to produce an N-substituted benzenesulfonamide. The electron-withdrawing...
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Titration of a Weak Base with a Strong Acid01:20

Titration of a Weak Base with a Strong Acid

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The titration curve of a weak base like ammonia with a strong acid like hydrochloric acid is the mirror image of the titration curve of a weak acid with a strong base.
Using the ICE table and substituting the Kb value, we calculate the initial pH of 50 mL of 0.1 M ammonia to be 11.11. Addition of 25 mL of 0.1 M hydrochloric acid to this solution of ammonia results in a buffer with an equal concentration of ammonia and ammonium ions. The pH of this buffer can be calculated by substituting these...
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Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
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Electrodes: Overview01:17

Electrodes: Overview

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 Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
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Electroanalytical overview: the sensing of hydroxylamine.

Prashanth S Adarakatti1,2, Robert D Crapnell1, Craig E Banks1

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Electrochemical sensing offers a rapid, portable, and sensitive method for detecting hydroxylamine, a hazardous environmental contaminant. This review highlights advancements in electroanalysis for hydroxylamine monitoring in real-world samples.

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Area of Science:

  • Analytical Chemistry
  • Environmental Science
  • Electrochemistry

Background:

  • Hydroxylamine is a key industrial chemical, also recognized as a mutagenic, carcinogenic environmental contaminant.
  • Conventional quantification methods for hydroxylamine are laboratory-based, limiting rapid, on-site monitoring.
  • There is a need for accessible and sensitive detection methods for hydroxylamine in various applications.

Purpose of the Study:

  • To review recent advancements in electrochemical sensing for hydroxylamine detection.
  • To discuss the advantages of electroanalytical methods over traditional techniques.
  • To explore future directions, method validation, and real-world applications of hydroxylamine sensors.

Main Methods:

  • Review of literature on electrochemical methods for hydroxylamine sensing.
  • Analysis of advancements in electroanalysis for sensitive and selective detection.
  • Discussion of portable, rapid, and cost-effective electrochemical sensor technologies.

Main Results:

  • Electrochemical methods provide portable, quick, affordable, simple, sensitive, and selective monitoring of hydroxylamine.
  • Recent advancements focus on improving electroanalytical techniques for hydroxylamine determination.
  • The review covers method validation and practical application in real samples.

Conclusions:

  • Electrochemical sensing is a promising alternative for hydroxylamine monitoring due to its practical advantages.
  • Further research and development in electroanalysis will enhance hydroxylamine detection capabilities.
  • Validated electrochemical devices can be effectively used for real-time hydroxylamine determination in environmental and industrial settings.