Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Electrospray Ionization (ESI) Mass Spectrometry01:12

Electrospray Ionization (ESI) Mass Spectrometry

2.0K
Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
ESI utilizes electrical energy to transfer ions from the liquid phase of the sample into the...
2.0K
Chemical Ionization (CI) Mass Spectrometry01:21

Chemical Ionization (CI) Mass Spectrometry

1.4K
The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
1.4K
Qualitative Analysis03:46

Qualitative Analysis

23.5K
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...
23.5K
Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview

1.7K
In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
1.7K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

48.5K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
48.5K
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

14.5K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
14.5K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Spreadable Biosensing Pregel for Analyte Visualization in Peeled Plant Tissues.

Analytical chemistry·2026
Same author

Rapid Classification of Coffee Varieties Using Single-Bean Hot Gas Extraction Ion-Mobility Spectrometry with Machine Learning.

ACS measurement science au·2026
Same author

Electrophoresis-By-Accident in Electrospray Ion Source.

Analytical chemistry·2026
Same author

Epidermal Patch Technologies for Integrated Healthcare and Infection Management.

Advanced healthcare materials·2026
Same author

Dynamic Additive Scanning for Precise Control in Electrospray Ionization Mass Spectrometry.

ACS measurement science au·2026
Same author

Negative Gaseous Ions in Positive-Voltage Electrospray Ionization Mass Spectrometry.

Analytical chemistry·2026
Same journal

From Fundamental Photophysics to Photocatalysis: Energy Gap Law Analysis of Anion Radical Excited States.

ACS central science·2026
Same journal

Mechanical Taming of Hardy-Cope Rearrangements.

ACS central science·2026
Same journal

Validation of <i>De Novo</i> Designs of Solid-Binding Peptides.

ACS central science·2026
Same journal

These Graphene Experts Are Trying to Close the Reproducibility Gap in Two-Dimensional Materials Research.

ACS central science·2026
Same journal

How to Make a Creamy, Tasty Vegan Camembert.

ACS central science·2026
Same journal

Versatile Pyridinium Trifluoroborate Platform for Facile Preparation of <sup>18</sup>F‑Labeled PET Tracers in Water.

ACS central science·2026
関連記事をすべて見る

関連する実験動画

Updated: Jan 7, 2026

Production of Membrane-Filtered Phase-Shift Decafluorobutane Nanodroplets from Preformed Microbubbles
07:10

Production of Membrane-Filtered Phase-Shift Decafluorobutane Nanodroplets from Preformed Microbubbles

Published on: March 23, 2021

3.1K

中性マイクロドロップレットからの気相イオン

Ochir Ochirov1, Pawel L Urban1

  • 1Department of Chemistry, National Tsing Hua University, 101, Section 2, Kuang-Fu Rd., Hsinchu, 300044, Taiwan.

ACS central science
|January 1, 2026
PubMed
まとめ
この要約は機械生成です。

中性の水滴は、接触帯電と機械的破砕によって帯電させることができます。このプロセスは、中性の水から気相イオンを形成する経路を作成します。

キーワード:
気相イオン水滴接触帯電機械的破砕大気科学エアロゾル科学

さらに関連する動画

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

9.1K
Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry
07:53

Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry

Published on: March 1, 2020

7.7K

関連する実験動画

Last Updated: Jan 7, 2026

Production of Membrane-Filtered Phase-Shift Decafluorobutane Nanodroplets from Preformed Microbubbles
07:10

Production of Membrane-Filtered Phase-Shift Decafluorobutane Nanodroplets from Preformed Microbubbles

Published on: March 23, 2021

3.1K
Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

9.1K
Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry
07:53

Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry

Published on: March 1, 2020

7.7K

科学分野:

  • 大気化学
  • 物理化学
  • エアロゾル科学

背景:

  • 気相イオンの形成は大気プロセスにとって重要です。
  • 水のイオン形成メカニズムの理解は、さまざまな科学分野にとって不可欠です。
  • 以前の研究では、イオンを生成するためのさまざまな方法が探求されてきました。

研究 の 目的:

  • 接触帯電と機械的破砕が中性の水滴を帯電させる役割を調査すること。
  • 中性の水からの気相イオン形成の経路を確立すること。
  • 水滴の帯電を支配する基本的なプロセスに関する洞察を提供すること。

主な方法:

  • 接触帯電をシミュレートするための制御された実験室実験を利用すること。
  • 水滴を断片化するための機械的破砕技術を採用すること。
  • これらのプロセスから生じる電荷分布とイオン形成を分析すること。

主要な成果:

  • 接触帯電が中性の水滴を効果的に帯電させることを実証しました。
  • 帯電した水滴の機械的破砕がさらなるイオン生成につながることを示しました。
  • 水滴の断片化と気相イオン収量の直接的な相関関係を特定しました。

結論:

  • 接触帯電と機械的破砕は、中性の水滴を帯電させるための実行可能なメカニズムです。
  • これらのプロセスは、水から気相イオンを生成するための経路を提供します。
  • この発見は、大気科学およびエアロゾル科学の研究に影響を与えます。