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関連する概念動画

Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

385
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
385
Indicators02:39

Indicators

49.3K
Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
49.3K
Precipitation Titration: Endpoint Detection Methods01:19

Precipitation Titration: Endpoint Detection Methods

2.1K
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.
In the Volhard method, a standard excess of AgNO3 is first added to the...
2.1K
Determining the pH of Salt Solutions04:08

Determining the pH of Salt Solutions

44.1K
The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution.  In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than...
44.1K
pH01:24

pH

137.0K
The potential of hydrogen (pH) is a measure of the acidity or basicity of a water-based solution determined by the concentration of hydronium ions (H3O+). In one liter of pure water at neutral pH, there are 1×10−7 moles of hydronium ions. However, the extensive range of hydronium ion concentrations present in water-based solutions makes measuring pH in moles cumbersome. Therefore, a pH scale was developed to convert moles of hydronium ions into the negative logarithm of the hydronium...
137.0K

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関連する実験動画

Updated: Sep 10, 2025

In vitro Monitoring of Extracellular pH in Real-Time
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in situ インターフェイス pH 検出の方法

Karina N Catalan1, Aaron D Ratschow1, Hans-Jürgen Butt1

  • 1Max Planck Institute for Polymer Research, 55128 Mainz, Germany.

The journal of physical chemistry letters
|August 21, 2025
PubMed
まとめ
この要約は機械生成です。

研究者は機能化された材料の表面の pH を正確に測定する方法を開発しました この技術はpHに敏感な染料と顕微鏡を用いて,正確な環境感知と材料の特徴づけを可能にします.

さらに関連する動画

Simultaneous pH Measurement in Endocytic and Cytosolic Compartments in Living Cells using Confocal Microscopy
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Simultaneous pH Measurement in Endocytic and Cytosolic Compartments in Living Cells using Confocal Microscopy

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Real-Time, Semi-Automated Fluorescent Measurement of the Airway Surface Liquid pH of Primary Human Airway Epithelial Cells
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Real-Time, Semi-Automated Fluorescent Measurement of the Airway Surface Liquid pH of Primary Human Airway Epithelial Cells

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関連する実験動画

Last Updated: Sep 10, 2025

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10:11

In vitro Monitoring of Extracellular pH in Real-Time

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Simultaneous pH Measurement in Endocytic and Cytosolic Compartments in Living Cells using Confocal Microscopy
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Real-Time, Semi-Automated Fluorescent Measurement of the Airway Surface Liquid pH of Primary Human Airway Epithelial Cells
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科学分野:

  • 材料科学
  • 表面化学
  • 分析化学

背景:

  • 機能化されたシリカ表面は様々な産業で不可欠です.
  • 表面をアミノシランで改造すると,表面のpHが変化し,測定が複雑になる.
  • 表面の振る舞いを理解するには,正確な界面pHモニタリングが不可欠です.

研究 の 目的:

  • 表面内でのpHモニタリングのための信頼性の高い方法を開発する.
  • 表面と総 pH の関係を調べる
  • 先進的な材料特徴と環境感知を可能にします.

主な方法:

  • アミノシランと結合したpH感度の高い光染料でガラス表面を機能化します.
  • コンフォカル顕微鏡を用いて,pHの変化に対する染料の光反応を測定する.
  • 表面化学と静電相互作用の理論モデルを開発する.

主要な成果:

  • 界面 pH と総 pH の間には線形的な関係が見られた.
  • 表面 pH は,総 pH に比べて狭い範囲を示した.
  • 挿入された染料の校正された光反応は,正確なpHモニタリングを可能にします.

結論:

  • 統合されたアプローチにより,正確な信頼性の高い in situ interfacial pH 監視が可能になります.
  • この方法は環境センシングの応用において大きな可能性を秘めています.
  • この発見は,高度な材料特徴化技術に寄与する.