High proportions of inorganic arsenic in Laminaria digitata but not in Ascophyllum nodosum samples from Ireland

Jenny M Ronan, Dagmar B Stengel, Andrea Raab, Jörg Feldmann, Linda O'Hea, Edi Bralatei, Evin McGovern

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Seaweed can accumulate inorganic arsenic (iAs) from seawater as hydrogen arsenate (HAsO4(2-)) in place of the phosphate anion (HPO4(2-)). While it is rapidly metabolised to organoarsenic species, predominantly arsenosugars and arsenolipids, iAs may be present in seaweed biomass and this poses a potential health concern for consumers of seaweed products. Here, the distribution of total (AsTOT) and iAs was determined in thallus parts of the kelp Laminaria digitata and the intertidal fucoid Ascophyllum nodosum (both Phaeophyceae) using inductively-coupled plasma mass spectrometry (ICP-MS) and high performance liquid chromatography - ICP-MS (HPLC-ICP-MS). AsTOT ranged from 36 to 131 mg kg(-1) dry weight (DW) in L. digitata, and from 38 to 111 mg kg(-1) DW in A. nodosum, with no statistically significant differences between different thallus parts. iAs was detected in all A. nodosum samples, comprising less than 1% of the AsTOT content. Concentrations of iAs in L. digitata were significantly higher, ranging from 2.2 to 87 mg kg(-1), increasing through the thallus from the stipe to the decaying distal blades. iAs comprised more than 50% of AsTOT in the middle to decaying distal blades. This finding has potential implications for harvesting, processing and use of Laminaria digitata in agri-, food and health applications.

Original languageEnglish
Pages (from-to)17-23
Number of pages7
JournalChemosphere
Volume186
Early online date17 Jul 2017
DOIs
Publication statusPublished - Nov 2017

Fingerprint

Ascophyllum
Laminaria
Arsenic
Ireland
arsenic
Seaweed
seaweed
Inductively coupled plasma mass spectrometry
Mass Spectrometry
Kelp
mass spectrometry
Health
Phaeophyta
plasma
Weights and Measures
Seawater
High performance liquid chromatography
arsenate
Biomass
Anions

Keywords

  • Journal Article
  • arsenic
  • macroalgae
  • speciation
  • HPLC-ICPMS
  • brown seaweed

Cite this

High proportions of inorganic arsenic in Laminaria digitata but not in Ascophyllum nodosum samples from Ireland. / Ronan, Jenny M; Stengel, Dagmar B; Raab, Andrea; Feldmann, Jörg; O'Hea, Linda; Bralatei, Edi; McGovern, Evin.

In: Chemosphere, Vol. 186, 11.2017, p. 17-23.

Research output: Contribution to journalArticle

Ronan, Jenny M ; Stengel, Dagmar B ; Raab, Andrea ; Feldmann, Jörg ; O'Hea, Linda ; Bralatei, Edi ; McGovern, Evin. / High proportions of inorganic arsenic in Laminaria digitata but not in Ascophyllum nodosum samples from Ireland. In: Chemosphere. 2017 ; Vol. 186. pp. 17-23.
@article{7c2ee02e0be749829df9d5f25812af34,
title = "High proportions of inorganic arsenic in Laminaria digitata but not in Ascophyllum nodosum samples from Ireland",
abstract = "Seaweed can accumulate inorganic arsenic (iAs) from seawater as hydrogen arsenate (HAsO4(2-)) in place of the phosphate anion (HPO4(2-)). While it is rapidly metabolised to organoarsenic species, predominantly arsenosugars and arsenolipids, iAs may be present in seaweed biomass and this poses a potential health concern for consumers of seaweed products. Here, the distribution of total (AsTOT) and iAs was determined in thallus parts of the kelp Laminaria digitata and the intertidal fucoid Ascophyllum nodosum (both Phaeophyceae) using inductively-coupled plasma mass spectrometry (ICP-MS) and high performance liquid chromatography - ICP-MS (HPLC-ICP-MS). AsTOT ranged from 36 to 131 mg kg(-1) dry weight (DW) in L. digitata, and from 38 to 111 mg kg(-1) DW in A. nodosum, with no statistically significant differences between different thallus parts. iAs was detected in all A. nodosum samples, comprising less than 1{\%} of the AsTOT content. Concentrations of iAs in L. digitata were significantly higher, ranging from 2.2 to 87 mg kg(-1), increasing through the thallus from the stipe to the decaying distal blades. iAs comprised more than 50{\%} of AsTOT in the middle to decaying distal blades. This finding has potential implications for harvesting, processing and use of Laminaria digitata in agri-, food and health applications.",
keywords = "Journal Article, arsenic, macroalgae, speciation, HPLC-ICPMS, brown seaweed",
author = "Ronan, {Jenny M} and Stengel, {Dagmar B} and Andrea Raab and J{\"o}rg Feldmann and Linda O'Hea and Edi Bralatei and Evin McGovern",
note = "This research was funded under the Department of Agriculture, Food and the Marine's Food Institutional Research Measure (FIRM) Reference number 14 SF 860. We thank Dr. Jeffrey Fisher (Marine Institute) for his comments and Andrew Morrissey, Rachel Crowley and Tom Szumski (Marine Institute) for their assistance with the project.",
year = "2017",
month = "11",
doi = "10.1016/j.chemosphere.2017.07.076",
language = "English",
volume = "186",
pages = "17--23",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - High proportions of inorganic arsenic in Laminaria digitata but not in Ascophyllum nodosum samples from Ireland

AU - Ronan, Jenny M

AU - Stengel, Dagmar B

AU - Raab, Andrea

AU - Feldmann, Jörg

AU - O'Hea, Linda

AU - Bralatei, Edi

AU - McGovern, Evin

N1 - This research was funded under the Department of Agriculture, Food and the Marine's Food Institutional Research Measure (FIRM) Reference number 14 SF 860. We thank Dr. Jeffrey Fisher (Marine Institute) for his comments and Andrew Morrissey, Rachel Crowley and Tom Szumski (Marine Institute) for their assistance with the project.

PY - 2017/11

Y1 - 2017/11

N2 - Seaweed can accumulate inorganic arsenic (iAs) from seawater as hydrogen arsenate (HAsO4(2-)) in place of the phosphate anion (HPO4(2-)). While it is rapidly metabolised to organoarsenic species, predominantly arsenosugars and arsenolipids, iAs may be present in seaweed biomass and this poses a potential health concern for consumers of seaweed products. Here, the distribution of total (AsTOT) and iAs was determined in thallus parts of the kelp Laminaria digitata and the intertidal fucoid Ascophyllum nodosum (both Phaeophyceae) using inductively-coupled plasma mass spectrometry (ICP-MS) and high performance liquid chromatography - ICP-MS (HPLC-ICP-MS). AsTOT ranged from 36 to 131 mg kg(-1) dry weight (DW) in L. digitata, and from 38 to 111 mg kg(-1) DW in A. nodosum, with no statistically significant differences between different thallus parts. iAs was detected in all A. nodosum samples, comprising less than 1% of the AsTOT content. Concentrations of iAs in L. digitata were significantly higher, ranging from 2.2 to 87 mg kg(-1), increasing through the thallus from the stipe to the decaying distal blades. iAs comprised more than 50% of AsTOT in the middle to decaying distal blades. This finding has potential implications for harvesting, processing and use of Laminaria digitata in agri-, food and health applications.

AB - Seaweed can accumulate inorganic arsenic (iAs) from seawater as hydrogen arsenate (HAsO4(2-)) in place of the phosphate anion (HPO4(2-)). While it is rapidly metabolised to organoarsenic species, predominantly arsenosugars and arsenolipids, iAs may be present in seaweed biomass and this poses a potential health concern for consumers of seaweed products. Here, the distribution of total (AsTOT) and iAs was determined in thallus parts of the kelp Laminaria digitata and the intertidal fucoid Ascophyllum nodosum (both Phaeophyceae) using inductively-coupled plasma mass spectrometry (ICP-MS) and high performance liquid chromatography - ICP-MS (HPLC-ICP-MS). AsTOT ranged from 36 to 131 mg kg(-1) dry weight (DW) in L. digitata, and from 38 to 111 mg kg(-1) DW in A. nodosum, with no statistically significant differences between different thallus parts. iAs was detected in all A. nodosum samples, comprising less than 1% of the AsTOT content. Concentrations of iAs in L. digitata were significantly higher, ranging from 2.2 to 87 mg kg(-1), increasing through the thallus from the stipe to the decaying distal blades. iAs comprised more than 50% of AsTOT in the middle to decaying distal blades. This finding has potential implications for harvesting, processing and use of Laminaria digitata in agri-, food and health applications.

KW - Journal Article

KW - arsenic

KW - macroalgae

KW - speciation

KW - HPLC-ICPMS

KW - brown seaweed

U2 - 10.1016/j.chemosphere.2017.07.076

DO - 10.1016/j.chemosphere.2017.07.076

M3 - Article

VL - 186

SP - 17

EP - 23

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -