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Related Concept Videos

Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
Gas Chromatography: Overview of Detectors01:13

Gas Chromatography: Overview of Detectors

Detectors in gas chromatography (GC) help identify and quantify the components of a mixture by translating chemical properties into measurable signals, which are displayed on a chromatogram. Detectors can be categorized into two main types: destructive and non-destructive.
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
¹H NMR of Labile Protons: Deuterium (²H) Substitution00:48

¹H NMR of Labile Protons: Deuterium (²H) Substitution

This lesson illustrates the role of deuterium substitution in simplifying the NMR spectrum of compounds comprising labile protons. One method employed is the use of deuterium. Amongst the three isotopes of hydrogen, deuterium (2H) has a nucleus composed of one proton and one neutron. When the D2O solvent is added to a pure dry ethanol solution, its labile proton is substituted with deuterium.
High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

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 properties and...
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)01:19

2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...

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Related Experiment Video

Updated: Jun 28, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

Interface-Engineered SnO2-PdO-Pd2Sn Composite: Toward High-Sensitivity Hydrogen Detection with Ultralow Detection

Zhicheng Lin1, Zhendong Ma1, Jiying Wei1

  • 1Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|June 26, 2026
PubMed
Summary

A novel SnO2-PdO-Pd2Sn (SPO/PS) composite enables highly sensitive, rapid, low-temperature hydrogen detection. This breakthrough addresses limitations of traditional sensors, paving the way for efficient trace hydrogen leak detection.

Keywords:
LODSnO2‐PdO‐Pd2Sn compositehydrogen sensorslow‐temperaturestability

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Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores
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Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 2015

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Last Updated: Jun 28, 2026

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores
10:31

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 2015

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Sensor Technology

Background:

  • Traditional tin dioxide (SnO2) gas sensors suffer from poor low-temperature sensitivity and slow kinetics, requiring high operating temperatures (200°C-500°C).
  • These limitations hinder practical applications in trace hydrogen leak detection.

Purpose of the Study:

  • To develop a novel composite material for efficient and rapid low-temperature hydrogen detection.
  • To overcome the performance drawbacks of conventional SnO2-based sensors.

Main Methods:

  • A two-step synthesis involving mild hydrothermal deposition of a Sn/Pd bimetallic precursor.
  • In situ phase transformation and interfacial regulation via calcination in inert argon to form the SnO2-PdO-Pd2Sn (SPO/PS) composite.

Main Results:

  • The SPO/PS sensor demonstrated a high response (28,976.56% to 2000 ppm H2) at 77°C, significantly outperforming pure SnO2 at high temperatures.
  • Achieved rapid response/recovery times (1.1/184.7 s), a low limit of detection (30 ppb), and excellent selectivity.
  • Maintained a substantial response (7651.38%) at 90% relative humidity and showed stable operation for 80 days.

Conclusions:

  • The facile synthesis of the SPO/PS composite offers a synergistic optimization of structure and performance.
  • This provides a promising new strategy for developing highly sensitive, low-temperature hydrogen sensors for practical applications.