Quantification of labile and stable non-polar arsenolipids in commercial fish meals and edible seaweed samples

Asta H. Petursdottir* (Corresponding Author), Jessica Rodrigues de Jesus, Helga Gunnlaugsdottir, Joerg Feldmann (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This study aims at fractionation of arsenic according to its polarity into water-soluble arsenic fractions, polar and non-polar arsenolipids in herring, capelin and blue whiting fish meal and edible seaweed dulse. Changing the sequential extraction order showed a significant labile fraction of the non-polar arsenolipids (AsLps) where species transformation is considered a more likely explanation than a partitioning problem in the compounds. The majority of non-polar AsLps were not stable through water extraction for three types of fish meal (71-93% for herring, capelin and blue whiting). The non-polar AsLp fraction was minor for dulse. In 27 samples of herring and blue whiting fish meal, arsenic was mainly present in the water phase: 71% (2.8 +/- 0.8 mg kg(-1)) and 93% (17.2 +/- 1.9 mg kg(-1)) for herring and blue whiting on average, respectively. The polar arsenolipids in the MeOH/DCM fraction accounted for 15% and 5% (0.5-1.2 mg kg(-1) As) for both herring and blue whiting, respectively. Speciation analysis of arsenolipids was undertaken for herring meal, capelin meal and dulse (red seaweed) using simultaneous HPLC-ICPMS/ESIMS for quantification and identification. Among the known arsenohydrocarbons (AsHCs), arseno fatty acids (AsFAs) and arsenosugarphospholipids (AsPLs), a novel AsFA374 was identified in dulse by arsenic detection via simultaneous protonated mass, accurate mass as well as MSMS fragmentation. Additionally, recently reported AsLp groups, arsenic containing phosphatidylcholines (AsPCs) and arseno fatty alcohols (TMAsFOHs), have been reconfirmed to occur in marine samples.

Original languageEnglish
Pages (from-to)102-110
Number of pages9
JournalJournal of Analytical Atomic Spectrometry
Volume33
Issue number1
Early online date17 Nov 2017
DOIs
Publication statusPublished - Jan 2018

Keywords

  • ARSENIC-CONTAINING HYDROCARBONS
  • VITRO TOXICOLOGICAL CHARACTERIZATION
  • CONTAINING FATTY-ACIDS
  • MARINE OILS
  • DEGRADATION-PRODUCTS
  • COD-LIVER
  • IDENTIFICATION
  • ICPMS
  • MS

Cite this

Quantification of labile and stable non-polar arsenolipids in commercial fish meals and edible seaweed samples. / Petursdottir, Asta H. (Corresponding Author); de Jesus, Jessica Rodrigues; Gunnlaugsdottir, Helga; Feldmann, Joerg (Corresponding Author).

In: Journal of Analytical Atomic Spectrometry, Vol. 33, No. 1, 01.2018, p. 102-110.

Research output: Contribution to journalArticle

Petursdottir, Asta H. ; de Jesus, Jessica Rodrigues ; Gunnlaugsdottir, Helga ; Feldmann, Joerg. / Quantification of labile and stable non-polar arsenolipids in commercial fish meals and edible seaweed samples. In: Journal of Analytical Atomic Spectrometry. 2018 ; Vol. 33, No. 1. pp. 102-110.
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abstract = "This study aims at fractionation of arsenic according to its polarity into water-soluble arsenic fractions, polar and non-polar arsenolipids in herring, capelin and blue whiting fish meal and edible seaweed dulse. Changing the sequential extraction order showed a significant labile fraction of the non-polar arsenolipids (AsLps) where species transformation is considered a more likely explanation than a partitioning problem in the compounds. The majority of non-polar AsLps were not stable through water extraction for three types of fish meal (71-93{\%} for herring, capelin and blue whiting). The non-polar AsLp fraction was minor for dulse. In 27 samples of herring and blue whiting fish meal, arsenic was mainly present in the water phase: 71{\%} (2.8 +/- 0.8 mg kg(-1)) and 93{\%} (17.2 +/- 1.9 mg kg(-1)) for herring and blue whiting on average, respectively. The polar arsenolipids in the MeOH/DCM fraction accounted for 15{\%} and 5{\%} (0.5-1.2 mg kg(-1) As) for both herring and blue whiting, respectively. Speciation analysis of arsenolipids was undertaken for herring meal, capelin meal and dulse (red seaweed) using simultaneous HPLC-ICPMS/ESIMS for quantification and identification. Among the known arsenohydrocarbons (AsHCs), arseno fatty acids (AsFAs) and arsenosugarphospholipids (AsPLs), a novel AsFA374 was identified in dulse by arsenic detection via simultaneous protonated mass, accurate mass as well as MSMS fragmentation. Additionally, recently reported AsLp groups, arsenic containing phosphatidylcholines (AsPCs) and arseno fatty alcohols (TMAsFOHs), have been reconfirmed to occur in marine samples.",
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note = "A. P ´ ´etursd´ottir thanks the Icelandic Research Fund, the Icelandic Research Fund for Graduate Students, the SORSAS Award and The College of Physical Sciences at Aberdeen University for nancial support. J. Rodrigues thanks the ERASMUS Programme. The Sildarvinnslan hf (SVN) and Vinnslustodin hf (VSV) are acknowledged for the sh meal samples and Finnbogi Gudmundsson for the dulse samples. Dr Andrea Raab and Dr Dagmar Urgast are both kindly thanked for their help.",
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AU - de Jesus, Jessica Rodrigues

AU - Gunnlaugsdottir, Helga

AU - Feldmann, Joerg

N1 - A. P ´ ´etursd´ottir thanks the Icelandic Research Fund, the Icelandic Research Fund for Graduate Students, the SORSAS Award and The College of Physical Sciences at Aberdeen University for nancial support. J. Rodrigues thanks the ERASMUS Programme. The Sildarvinnslan hf (SVN) and Vinnslustodin hf (VSV) are acknowledged for the sh meal samples and Finnbogi Gudmundsson for the dulse samples. Dr Andrea Raab and Dr Dagmar Urgast are both kindly thanked for their help.

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N2 - This study aims at fractionation of arsenic according to its polarity into water-soluble arsenic fractions, polar and non-polar arsenolipids in herring, capelin and blue whiting fish meal and edible seaweed dulse. Changing the sequential extraction order showed a significant labile fraction of the non-polar arsenolipids (AsLps) where species transformation is considered a more likely explanation than a partitioning problem in the compounds. The majority of non-polar AsLps were not stable through water extraction for three types of fish meal (71-93% for herring, capelin and blue whiting). The non-polar AsLp fraction was minor for dulse. In 27 samples of herring and blue whiting fish meal, arsenic was mainly present in the water phase: 71% (2.8 +/- 0.8 mg kg(-1)) and 93% (17.2 +/- 1.9 mg kg(-1)) for herring and blue whiting on average, respectively. The polar arsenolipids in the MeOH/DCM fraction accounted for 15% and 5% (0.5-1.2 mg kg(-1) As) for both herring and blue whiting, respectively. Speciation analysis of arsenolipids was undertaken for herring meal, capelin meal and dulse (red seaweed) using simultaneous HPLC-ICPMS/ESIMS for quantification and identification. Among the known arsenohydrocarbons (AsHCs), arseno fatty acids (AsFAs) and arsenosugarphospholipids (AsPLs), a novel AsFA374 was identified in dulse by arsenic detection via simultaneous protonated mass, accurate mass as well as MSMS fragmentation. Additionally, recently reported AsLp groups, arsenic containing phosphatidylcholines (AsPCs) and arseno fatty alcohols (TMAsFOHs), have been reconfirmed to occur in marine samples.

AB - This study aims at fractionation of arsenic according to its polarity into water-soluble arsenic fractions, polar and non-polar arsenolipids in herring, capelin and blue whiting fish meal and edible seaweed dulse. Changing the sequential extraction order showed a significant labile fraction of the non-polar arsenolipids (AsLps) where species transformation is considered a more likely explanation than a partitioning problem in the compounds. The majority of non-polar AsLps were not stable through water extraction for three types of fish meal (71-93% for herring, capelin and blue whiting). The non-polar AsLp fraction was minor for dulse. In 27 samples of herring and blue whiting fish meal, arsenic was mainly present in the water phase: 71% (2.8 +/- 0.8 mg kg(-1)) and 93% (17.2 +/- 1.9 mg kg(-1)) for herring and blue whiting on average, respectively. The polar arsenolipids in the MeOH/DCM fraction accounted for 15% and 5% (0.5-1.2 mg kg(-1) As) for both herring and blue whiting, respectively. Speciation analysis of arsenolipids was undertaken for herring meal, capelin meal and dulse (red seaweed) using simultaneous HPLC-ICPMS/ESIMS for quantification and identification. Among the known arsenohydrocarbons (AsHCs), arseno fatty acids (AsFAs) and arsenosugarphospholipids (AsPLs), a novel AsFA374 was identified in dulse by arsenic detection via simultaneous protonated mass, accurate mass as well as MSMS fragmentation. Additionally, recently reported AsLp groups, arsenic containing phosphatidylcholines (AsPCs) and arseno fatty alcohols (TMAsFOHs), have been reconfirmed to occur in marine samples.

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KW - VITRO TOXICOLOGICAL CHARACTERIZATION

KW - CONTAINING FATTY-ACIDS

KW - MARINE OILS

KW - DEGRADATION-PRODUCTS

KW - COD-LIVER

KW - IDENTIFICATION

KW - ICPMS

KW - MS

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JO - Journal of Analytical Atomic Spectrometry

JF - Journal of Analytical Atomic Spectrometry

SN - 0267-9477

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