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Related Concept Videos

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
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...
MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
Molecular Models02:00

Molecular Models

Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
Mass Spectrometers01:16

Mass Spectrometers

This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:

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Updated: May 28, 2026

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles

Published on: March 13, 2017

Decoding complex chemical mixtures with a physical model of a sensor array.

Julia Tsitron1, Addison D Ault, James R Broach

  • 1Department of Physics & Astronomy and BioMaPS Institute for Quantitative Biology, Rutgers University, Piscataway, New Jersey, United States of America.

Plos Computational Biology
|November 3, 2011
PubMed
Summary
This summary is machine-generated.

This study presents a physical model for quantitative prediction of compound concentrations in mixtures using combinatorial sensor arrays. Antagonistic receptor responses are crucial for accurate concentration prediction, enabling discrimination of twice the number of components as sensors.

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Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
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Last Updated: May 28, 2026

Microfluidic Platform with Multiplexed Electronic Detection for Spatial Tracking of Particles
11:54

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Published on: March 13, 2017

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy
08:49

Multimodal Nonlinear Hyperspectral Chemical Imaging Using Line-Scanning Vibrational Sum-Frequency Generation Microscopy

Published on: December 1, 2023

Area of Science:

  • Biophysical chemistry
  • Chemical sensing
  • Systems biology

Background:

  • Combinatorial sensor arrays offer high analyte detection with limited receptors.
  • Predicting concentrations in mixtures is challenging due to complex receptor responses and non-linearity.

Purpose of the Study:

  • To develop a physical model for quantitative prediction of compound concentrations in mixtures.
  • To derive design principles for accurate mixture discrimination using cross-specific sensor arrays.

Main Methods:

  • Developed a physical model incorporating receptor-ligand interactions.
  • Applied the model to infer concentrations of sugar nucleotides using engineered G-protein-coupled receptors.
  • Derived design principles for optimal sensor array performance.

Main Results:

  • The model accurately infers concentrations of highly related sugar nucleotides.
  • Optimal sensor parameters show weak dependence on component concentrations, allowing broad applicability.
  • The maximum number of discriminable mixture components is twice the number of sensors.
  • Antagonistic receptor responses are essential for accurate concentration prediction.

Conclusions:

  • A physical model can overcome challenges in quantitative mixture analysis using sensor arrays.
  • Designed sensor arrays with specific properties enable accurate discrimination of complex mixtures.
  • Understanding and utilizing antagonistic receptor responses is key for advanced chemical sensing applications.