Estimation of Purity

Estimation of Purity in Laboratory Techniques

  • Analytical methods: are usually used to determine the purity of a substance. This could be High-Performance Liquid Chromatography (HPLC), Gas Chromatography (GC), or Thin Layer Chromatography (TLC).
  • Impurities detection: There are different methods to detect impurities, such as spectroscopy (IR, UV, NMR), microscopy, or chemical testing.
  • Melting and Boiling points: Pure substances have specific melting and boiling points. By measuring these, you can determine the purity of a sample.
  • Colorimetry and Spectrophotometry: The colour intensity of a solution can be used to determine the concentration of a sample, this is based on Beer-Lambert’s law.

Chemical and Physical Properties

  • Physical properties: They can be observed without changing the makeup of the substance. These include properties such as melting point, boiling point, and density.
  • Chemical properties: They can only be observed during a chemical reaction. Properties include flammability and reactivity.

Analysis and Interpretation

  • Data Analysis: The use of statistical methods to decipher and interpret experimental results.
  • Critical Thinking: Interpreting data can often require critical thinking skills. Determining what information is relevant and which theories apply is crucial.
  • Use of Software: Software such as Excel and Prism can be used for statistical analysis and graphical representation of data.