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World Journal of Chemical Education
Number of Followers: 2

This is an Open Access Journal

Open Access journal
ISSN (Print) 2375-1665 - ISSN (Online) 2375-1657
Published by Science and Education Publishing

[75 journals]

Cicada Shells as Chemical Education Resources to Study Functional Groups
and Environmental Cycles
- Authors: Naoki Maruyama; Toratane Munegumi
  Pages: 127 - 133
  Abstract: Cicada shells are widely available and have been used to teach insect anatomy; their tactile nature is ideal for students who are reluctant to handle living insects. The main component of cicada shells is chitin, which has a polymer structure of N-acetylglucosamine that produces an amorphous gel in neutral aqueous solutions. Glucosamine has a reducing group (hemiacetal structure) and an amino group, and these functional groups can be detected with Benedict reagent and ninhydrin, respectively. This research proposes a procedure to detect the glucosamine structural features present in cicada shells and highlights the link between chemicals in the cicada shells and the environment. Cicada shells can thus be useful for teaching classes about chemicals and their role in the environment.
  PubDate: 2023-10-17
  DOI: 10.12691/wjce-11-4-1
  Issue No: Vol. 11, No. 4 (2023)
Metal Ions Separation Via Paper Chromatography: Enhanced Methods Using
Eluting Solutions
- Authors: Arijit Das; Digvijoya Sarmaa, Paresh Debnath, Bijaya Paul
  Pages: 134 - 140
  Abstract: Chromatography is an essential physical technique that allows the constituent components of a mixture to be identified, separated, and purified in preparation for qualitative examination. Paper chromatography (PC) is a sort of planar chromatography, which refers to a stationary phase that is a solid, flat surface. In this illustration stationary phase is a particular kind of paper (Whatman quantitative filter paper grade 41). The fundamental idea behind paper chromatography is the differential passage of a mixture's constituent parts through filter paper or chromatography paper. A quick method for separating mixtures of metal ions, amino acids, carbohydrates, colors, and pharmaceuticals is paper chromatography (PC). For this qualitative analysis, only a very small sample is needed. Metal cation separation has seen increased by the use of the PC approach. Here, the four experiments show how PC may be used to separate metal ions [(Pb2+ & Cu2+), (Ni2+ & Co2+), (Cu2+ & Fe3+), (Cu2+ & Co2+)] based on their colored spots and the retardation factors or retention factors (Rf) values by using different eluting solutions.
  PubDate: 2023-11-07
  DOI: 10.12691/wjce-11-4-2
  Issue No: Vol. 11, No. 4 (2023)

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