Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Qualitative Analysis03:46

Qualitative Analysis

For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
Gravimetry: Inorganic And Organic Precipitating Agents00:49

Gravimetry: Inorganic And Organic Precipitating Agents

In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Common Ion Effect03:24

Common Ion Effect

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
Electrogravimetric Analysis: Overview01:30

Electrogravimetric Analysis: Overview

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...
Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

INFANTILE HYPERTROPHIC PYLORIC STENOSIS IN NIGERIA: A MULTICENTER RETROSPECTIVE STUDY.

Annals of Ibadan postgraduate medicine·2026
Same author

A brush with danger: operative management of a through and through urethral and rectal injury following paintbrush insertion into the urethra.

Annals of the Royal College of Surgeons of England·2025
Same author

Optimizing performance in young goats: impact of concentrate supplementation in Cicer arietinum straw-based diets on rumen fermentation, nutrient availability, blood profile and growth.

Tropical animal health and production·2025
Same author

Effectiveness of non-pharmaceutical interventions as implemented in the UK during the COVID-19 pandemic: a rapid review.

Journal of public health (Oxford, England)·2025
Same author

Effect of exogenous β-hydroxybutyrate on BDNF signaling, cognition, and amyloid precursor protein processing in humans with T2D and insulin-resistant rodents.

American journal of physiology. Cell physiology·2025
Same author

Examination of Akt and GSK3β in BDNF-mediated reductions in BACE1 activity in neuronal cells.

Physiological reports·2024
Same journal

A versatile graphene-like film as a chemo-resistive platform for selective ammonia gas sensing.

Talanta·2026
Same journal

Enhanced determination of 85 mycotoxins in challenging root and rhizome herbal medicines using online segmented multi-dimensional liquid chromatography-tandem mass spectrometry.

Talanta·2026
Same journal

Tailoring oxygen vacancy of WO<sub>3</sub> nanoparticles for high-performance gas sensing: room-temperature NO<sub>2</sub> and low-temperature triethylamine detection.

Talanta·2026
Same journal

Mixed potential acetone sensor based on LaBaCo<sub>2-x</sub>Fe<sub>x</sub>O<sub>5±δ</sub> (x=0, 0.05 and 0.2) sensing electrode and yttria-stabilized zirconia for non-invasive diagnosis of diabetes.

Talanta·2026
Same journal

A nanowire-based fluorescent sensor for detecting hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) dyshomeostasis in cell body and synapse of Alzheimer's disease (AD) cell model.

Talanta·2026
Same journal

Ultra-sensitive determination of cyclopiazonic acid in complex food samples via competitive time-resolved luminescence immunoassays coupled to green microextraction.

Talanta·2026
See all related articles

Related Experiment Video

Updated: Jun 28, 2026

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
07:24

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis

Published on: May 10, 2021

Systematic analysis for common cations by solid-state spot-tests.

M Qureshi1, A Mohammad, G G Raju

  • 1Chemistry Section, Z. H. College of Engineering & Technology, Aligarh Muslim University, Aligarh-202001, India.

Talanta
|November 1, 1981
PubMed
Summary
This summary is machine-generated.

This study systematically examined solid-state capillary spot-tests for 17 cations using 16 reagents. New color reactions were identified and compared to solution-based methods for improved analytical applications.

More Related Videos

Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
09:42

Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples

Published on: August 7, 2016

X-ray Powder Diffraction in Conservation Science: Towards Routine Crystal Structure Determination of Corrosion Products on Heritage Art Objects
09:16

X-ray Powder Diffraction in Conservation Science: Towards Routine Crystal Structure Determination of Corrosion Products on Heritage Art Objects

Published on: June 8, 2016

Related Experiment Videos

Last Updated: Jun 28, 2026

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
07:24

Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis

Published on: May 10, 2021

Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
09:42

Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples

Published on: August 7, 2016

X-ray Powder Diffraction in Conservation Science: Towards Routine Crystal Structure Determination of Corrosion Products on Heritage Art Objects
09:16

X-ray Powder Diffraction in Conservation Science: Towards Routine Crystal Structure Determination of Corrosion Products on Heritage Art Objects

Published on: June 8, 2016

Area of Science:

  • Analytical Chemistry
  • Inorganic Chemistry

Background:

  • Spot-tests are a common qualitative analytical technique.
  • Understanding cation-reagent interactions is crucial for accurate chemical analysis.

Purpose of the Study:

  • To systematically evaluate solid-state capillary spot-tests for 17 different cations.
  • To compare the efficacy of these solid-state tests with traditional solution-based color reactions.
  • To identify and describe novel chemical reactions for cation detection.

Main Methods:

  • Utilized solid-state capillary spot-tests involving 17 distinct cations.
  • Employed a panel of 16 organic and inorganic reagents for testing.
  • Conducted comparative analyses of color reactions in both solid-state and solution phases.

Main Results:

  • Successfully examined the reactions of 17 cations with 16 reagents in a solid-state format.
  • Identified and documented several previously undescribed color reactions.
  • Established a systematic classification of the observed cation-reagent interactions.

Conclusions:

  • Solid-state capillary spot-tests offer a viable and systematic method for cation identification.
  • The study provides a valuable systematization of cation detection reactions, aiding qualitative analysis.
  • New reactions discovered enhance the repertoire of available analytical tools for chemists.