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Related Concept Videos

Prochirality02:05

Prochirality

The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...

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2'-hydroxychalcone as an analytical reagent for beryllium.

R R Naidu1

  • 1Department of Chemistry, Sri Venkateswara University College, Tirupati, Andhra Pradesh, India.

Talanta
|July 1, 1975
PubMed
Summary

A new reagent, 2'-hydroxychalcone, specifically precipitates beryllium for gravimetric analysis. This method offers accurate beryllium determination, even with interfering elements like aluminum and iron.

Area of Science:

  • Analytical Chemistry
  • Inorganic Chemistry

Background:

  • Beryllium is often found with aluminum and iron in ores.
  • Accurate gravimetric determination of beryllium is crucial for its extraction and analysis.

Purpose of the Study:

  • To develop specific reagents for beryllium precipitation.
  • To establish a gravimetric method for beryllium determination in the presence of common interfering elements.

Main Methods:

  • Screening of several o-hydroxychalcones as potential beryllium reagents.
  • Utilizing EDTA to enhance reagent specificity.
  • Gravimetric determination of beryllium using the selected 2 ahydroxychalcone reagent.
  • Analysis of beryllium in beryl ore samples.

Main Results:

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  • 2 ahydroxychalcone demonstrated high specificity for beryllium precipitation when EDTA was present.
  • The beryllium-chalcone complex is stable and can be dried at 105-110°C.
  • Quantitative separation of beryllium from aluminum and iron was achieved.
  • Gravimetric determination of beryllium in beryl yielded results comparable to established methods.

Conclusions:

  • 2 ahydroxychalcone is proposed as a new, specific reagent for the gravimetric determination of beryllium.
  • The developed method provides accurate and reliable results for beryllium analysis in complex matrices.