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Related Concept Videos

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

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

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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...
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Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

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For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
 Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...
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Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences

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Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
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Atomic Emission Spectroscopy: Lab01:29

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AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
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Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.
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Inorganic arsenic speciation analysis in food using HPLC/ICP-MS: Method development and validation.

Yu-Cheng Lai1, Yi-Chen Tsai1, Yu-Ning Shin1

  • 1Division of Research and Analysis, Taiwan Food and Drug Administration, Ministry of Health and Welfare, No.161-2, Kunyang St, Nangang District, Taipei City, 11561, Taiwan, ROC.

Journal of Food and Drug Analysis
|February 8, 2023
PubMed
Summary

A new HPLC/ICP-MS method accurately measures inorganic arsenic (iAs) in foods like rice and seafood. Surveillance found only Hijiki seaweed exceeded safety limits for iAs, ensuring food safety.

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Author Spotlight: Technologies and Challenges in Elemental Analysis of Food Samples
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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry
  • Food Science

Background:

  • Inorganic arsenic (iAs) is more toxic than organic arsenic and can accumulate in food from contaminated environments.
  • Regulatory bodies have established iAs limits in staple foods like rice, seaweed, seafood, and marine oils to protect public health.
  • Accurate and selective analytical methods are crucial for monitoring iAs levels in diverse food matrices.

Purpose of the Study:

  • To develop and validate a robust analytical method for the selective determination of inorganic arsenic (iAs) in various food types.
  • To assess the efficacy of the developed method in quantifying iAs in rice, seaweed, seafood, and marine oils.
  • To conduct surveillance studies on iAs content in commercially available food products.

Main Methods:

  • Combined High-Performance Liquid Chromatography/Inductively Coupled Plasma-Mass Spectrometry (HPLC/ICP-MS) was employed for iAs speciation.
  • Extraction of iAs from food matrices was performed using a nitric acid and hydrogen peroxide solution under sonication.
  • Oxidation of As(III) to As(V) prior to HPLC/ICP-MS analysis prevented chromatographic interferences.

Main Results:

  • The developed HPLC/ICP-MS method demonstrated high extraction efficiencies (>90%) and low limits of quantification (0.02 mg/kg in fish oil).
  • Method validation across various food matrices (rice, seaweed, seafood, marine oil) showed excellent average recoveries (87.5–112.4%) and precision (<10% CV).
  • Market surveillance revealed only Hijiki seaweed exceeded the regulatory limit for iAs; other samples complied with standards.

Conclusions:

  • The validated HPLC/ICP-MS method provides a quick, straightforward, and reliable approach for routine iAs analysis in a wide range of food products.
  • The method effectively safeguards public health by ensuring compliance with established iAs safety standards in the food supply.
  • Findings underscore the importance of continued monitoring, particularly for specific seaweeds like Hijiki, regarding inorganic arsenic contamination.