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Related Concept Videos

Qualitative Analysis03:46

Qualitative Analysis

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...
Development of Analytical Methods01:21

Development of Analytical Methods

An analytical methodology can be divided into four sequential steps: technique, method, procedure, and protocol. A technique is a scientific principle that rationalizes a specific phenomenon through chemical measurements. Adapting a technique for analyzing a sample of interest is termed a method. The procedure outlines the directions for performing the analysis via an analytical method. The protocol is the detailed guidelines on the procedure, which should be strictly followed to obtain the...
Qualitative Analysis01:10

Qualitative Analysis

Qualitative analysis is the process of identifying elements, ions, or compounds in an unknown sample. It is the first and most fundamental type of analysis based on the hierarchy of analytical goals. This hierarchy is significant as it provides a structured approach to scientific research, with qualitative analysis serving as the initial step, providing essential information before moving on to quantitative or other forms of analysis.
There are two main approaches to qualitative analysis:...
Quantitative Analysis01:12

Quantitative Analysis

Quantitative analysis is a technique for measuring the amount of specific constituents in a sample. When the sample's composition is unknown, qualitative analysis is performed first to identify its components, which ensures that the correct substances are measured during the quantitative phase.
In quantitative analysis, two key measurements are made: the sample quantity and a property proportional to the amount of the analyte (the substance being analyzed). This forms the basis of the method...

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Related Experiment Video

Updated: Jun 13, 2026

Electronic Tongue Generating Continuous Recognition Patterns for Protein Analysis
08:46

Electronic Tongue Generating Continuous Recognition Patterns for Protein Analysis

Published on: September 16, 2014

SERS-Based E-Tongue Data Analysis Methods: From Spectrum Preparation to Qualitative and Quantitative Modeling.

Pengju Yin1, Xiaoyao Wu1, Yumeng Xiao1

  • 1School of Mathematics and Physics, Hebei University of Engineering, Handan, Hebei 056038, China.

ACS Sensors
|March 3, 2026
PubMed
Summary
This summary is machine-generated.

Surface-enhanced Raman spectroscopy (SERS)-based electronic tongues (E-tongues) offer noninvasive taste analysis. This review guides researchers in selecting machine learning methods for SERS data, addressing challenges in complex mixture analysis.

Keywords:
E-tongueSERSdata preprocessingevaluation indicatorsliquid detectionmachine learning algorithmsmethod selection guidancequalitative analysisquantitative analysis

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Chemometrics

Background:

  • Surface-enhanced Raman spectroscopy (SERS) coupled with electronic tongues (E-tongues) provides label-free taste analysis.
  • SERS-E-tongues utilize sensing arrays, spectral acquisition, and machine learning (ML) for complex liquid analysis.
  • Extracting features and selecting appropriate ML methods for SERS data remain challenging.

Purpose of the Study:

  • To review SERS-based E-tongue principles and progress.
  • To provide guidance on scientifically selecting ML methods for SERS data based on characteristics and goals.
  • To address practical data processing challenges for SERS-E-tongue researchers.

Main Methods:

  • Systematic review of SERS-E-tongue technical principles and research progress.
  • Summary and evaluation of preprocessing and feature engineering methods for SERS data.
  • Guidelines for selecting qualitative and quantitative ML algorithms based on spectral data and task requirements.

Main Results:

  • Detailed review of SERS-E-tongue technology and its applications.
  • Systematic summary of data preprocessing, feature engineering, and ML algorithm selection strategies.
  • Practical methodological references for laboratory researchers in the field.

Conclusions:

  • Effective ML method selection is crucial for SERS-E-tongue data analysis.
  • The review provides a framework for choosing appropriate methods based on data and objectives.
  • Addresses current bottlenecks and outlines future research directions in SERS-E-tongue technology.