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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
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High-Performance Liquid Chromatography: Types of Detectors01:15

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The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
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In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
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Related Experiment Video

Updated: Sep 3, 2025

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research
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Unlocking All-Solid Ion Selective Electrodes: Prospects in Crop Detection.

Jiawei Zhai1,2, Bin Luo1, Aixue Li1

  • 1Research Center of Intelligent Equipment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.

Sensors (Basel, Switzerland)
|July 28, 2022
PubMed
Summary

All-solid-state ion-selective electrodes (ASSISEs) offer a promising method for detecting essential nutrient and harmful heavy metal ions in crops. This review highlights their development and application in agricultural monitoring for improved crop health and safety.

Keywords:
all-solid-state ion-selective electrodecrop ion detectionion selective electrode potential methodsensor miniaturization

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Area of Science:

  • Agricultural Science
  • Analytical Chemistry
  • Sensor Technology

Background:

  • Nutrient and heavy metal ions significantly impact crop growth and quality.
  • Accurate ion detection is crucial for sustainable agriculture and food safety.
  • Existing detection methods may have limitations in field applications.

Purpose of the Study:

  • To review the development and principles of all-solid-state ion-selective electrodes (ASSISEs).
  • To demonstrate the feasibility of ASSISEs for detecting ions relevant to crop health.
  • To discuss the application of ASSISEs in various agricultural contexts and environmental interferences.

Main Methods:

  • Review of existing literature on ASSISE development and application in agriculture.
  • Analysis of the detection principles and characteristics of ASSISEs.
  • Discussion of case studies on crop nutrition, heavy metal pollution, and soil conditions.

Main Results:

  • ASSISEs exhibit significant potential for in-situ and real-time monitoring of ions in agricultural settings.
  • The technology is applicable for detecting both internal and external crop ion concentrations.
  • Environmental factors can influence the accuracy of ASSISE measurements, requiring careful consideration.

Conclusions:

  • ASSISEs are a viable technology for advancing ion detection in crops.
  • Further research is needed to optimize sensor performance and address environmental interferences.
  • This review provides a foundation for future developments in crop ion analysis.