Speciation of Six Arsenic Compounds in Korean Seafood Samples by HPLC-ICP-MS

2005 ◽  
Vol 277-279 ◽  
pp. 431-437 ◽  
Author(s):  
Kyung Su Park ◽  
Jeong Sook Kim ◽  
Hyo Min Lee ◽  
Hee Soo Pyo ◽  
Soon Tae Kim ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
High Performance ◽  
Certified Reference Materials ◽  
Arsenic Speciation ◽  
Inorganic Arsenic ◽  
Arsenic Species ◽  
Arsenic Compounds ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Fish And Shellfish

Extracts of 33 samples of seaweed, shrimp, fish and shellfish, including two certified reference materials, were investigated for their contents of arsenic compounds (arsenic speciation).An anion exchange high performance liquid chromatography procedure was optimized to separate six arsenic compounds present in the seafood samples with dynamic reaction gas cell by inductively coupled plasma mass spectrometry. The concentration of each species in the sample were: arsenobetaines - 0.019-1.04 mg/kg, arsenocholine - 0.033-69.0 mg/kg, arseniousacid - ND-1.25 mg/kg, dimethylarsinate - ND-3.75 mg/kg, monomethylarsonate - ND-8.33 mg/kg, arsenic acid - ND-0.55 mg/kg. Additionally, unknown arsenic species were present in most of samples. The intake of inorganic arsenic via ingestion of the seafood samples that were analyzed did not represent a toxicological problem to humans. The limits of detection (LOD) were in the range of 0.5-2.5 µg/kg .

scholarly journals A fully validated method for the determination of arsenic species in rice and infant cereal products

2012 ◽  
Vol 84 (2) ◽  
pp. 225-238 ◽  
Author(s):  
Toni Llorente-Mirandes ◽  
Josep Calderón ◽  
José Fermín López-Sánchez ◽  
Francesc Centrich ◽  
Roser Rubio
Keyword(s):  
Inductively Coupled Plasma ◽  
Certified Reference Materials ◽  
Inorganic Arsenic ◽  
Coupled System ◽  
Arsenic Species ◽  
Proficiency Tests ◽  
Cereal Products ◽  
Inductively Coupled ◽  
As Species ◽  
Plasma Mass Spectrometry

A full validation of inorganic arsenic (iAs), methylarsonic acid (MA), and dimethyl arsinic acid (DMA) in several types of rice and rice-based infant cereals is reported. The analytical method was developed and validated in two laboratories. The extraction of the As species was performed using nitric acid 0.2 % and hydrogen peroxide 1 %, and the coupled system liquid chromatography-inductively coupled plasma-mass spectrometry (LCICP-MS) was used for speciation measurements. Detection limit (DL), quantification limit, linearity, precision, trueness, accuracy, selectivity, as well as expanded uncertainty for iAs, MA, and DMA were established. The certified reference materials (CRMs) (NMIJ 7503a, NCS ZC73008, NIST SRM 1568a) were used to check the accuracy. The method was shown to be satisfactory in two proficiency tests (PTs). The broad applicability of the method is shown from the results of analysis of 29 samples including several types of rice, rice products, and infant cereal products. Total As ranged from 40.1 to 323.7 μg As kg–1. From the speciation results, iAs was predominant, and DMA was detected in some samples while MA was not detected in any sample.

scholarly journals Cyanobacteria produce arsenosugars

2012 ◽  
Vol 9 (5) ◽  
pp. 474 ◽  
Author(s):  
Shin-ichi Miyashita ◽  
Shoko Fujiwara ◽  
Mikio Tsuzuki ◽  
Toshikazu Kaise
Keyword(s):  
Inductively Coupled Plasma ◽  
High Performance ◽  
Inorganic Arsenic ◽  
Freshwater Ecosystems ◽  
Dimethylarsinic Acid ◽  
Arsenic Compounds ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Synechocystis Sp ◽  
Pcc 6803

Environmental contextAlthough arsenic is known to accumulate in both marine and freshwater ecosystems, the pathways by which arsenic is accumulated and transferred in freshwater systems are reasonably unknown. This study revealed that freshwater cyanobacteria have the ability to produce arsenosugars from inorganic arsenic compounds. The findings suggest that not only algae, but cyanobacteria, play an important role in the arsenic cycle of aquatic ecosystems. AbstractMetabolic processes of incorporated arsenate in axenic cultures of the freshwater cyanobacteria Synechocystis sp. PCC 6803 and Nostoc (Anabaena) sp. PCC 7120 were examined. Analyses of arsenic compounds in cyanobacterial extracts using a high-performance liquid chromatography–inductively coupled plasma mass spectrometry system showed that both strains have an ability to biotransform arsenate into oxo-arsenosugar-glycerol within 20 min through (1) reduction of incorporated arsenate to arsenite and (2) methylation of produced arsenite to dimethylarsinic acid by methylarsonic acid as a possible intermediate product. In addition, Synechocystis sp. PCC 6803 cells are able to biosynthesise oxo-arsenosugar-phosphate from incorporated arsenate. These findings suggest that arsenosugar formation as well as arsenic methylation in cyanobacteria possibly play a significant role in the global arsenic cycle.

Arsenic speciation in rice and risk assessment of inorganic arsenic from Ghentugachhi village of Chakdaha block, Nadia, West Bengal, India

2020 ◽  
Vol 57 (2) ◽  
pp. 85-93
Author(s):  
B Sinha ◽  
K Bhattacharyya
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
West Bengal ◽  
Arsenic Speciation ◽  
Inorganic Arsenic ◽  
Rice Grain ◽  
Species Determination ◽  
Inductively Coupled ◽  
As Species ◽  
Plasma Mass Spectrometry

The purpose of the present study was to assess arsenic (As) speciation in rice from West Bengal, India, in order to improve understanding of the health risk posed by arsenic in Indian rice. Rice is a potentially important route of human exposure to arsenic, especially in populations with rice-based diets. However, arsenic toxicity varies greatly with species. Determination of arsenic (As) species in rice is necessary because inorganic As species are more toxic than organic As. Total arsenic was determined by inductively coupled plasma mass spectrometry; arsenite, arsenate, monomethylarsonic acid, and dimethyarsinic acid were quantified by high-performance liquid chromatography- inductively coupled plasma mass spectrometry. The analysis of a rice flour certified reference material (SRM-1568-a) were evaluated for quality assurance. The use of 2M TFA for extraction with an isocratic mobile phase was optimized for extraction and employed for arsenic speciation in rice. The extraction method showed a high recovery of arsenic. Most of the As species in rice were noticed to be inorganic [Arsenite (As-III), Arsenate As-V]. It appeared very clear from the present study that inorganic arsenic shared maximum arsenic load in rice straw while in grains it is considerably low. As species recovered from rice grain and straw are principally As-III and As-V with a little share of DMA and almost non-detectable MMA and As-B. The order of As species in rice grain revealed in this study were As-III (54.5-65.4 %)>As-V(21.2-28.3%)>DMA(5.2%).

Arsenic compounds in tissues of the leatherback turtle, Dermochelys coriacea

1994 ◽  
Vol 74 (2) ◽  
pp. 463-466 ◽  
Author(s):  
J.S. Edmonds ◽  
Y. Shibata ◽  
R.I.T. Prince ◽  
K.A. Francesconi ◽  
M. Morita
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
High Performance ◽  
Pectoral Muscle ◽  
Dermochelys Coriacea ◽  
Aqueous Extracts ◽  
Arsenic Compounds ◽  
Leatherback Turtle ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

Examination of extracts of tissues of a leatherback turtle, Dermochelys coriacea (L.) (Reptilia: Dermochelyidae) by high-performance liquid chromatography inductively coupled plasma-mass spectrometry has demonstrated the presence of arsenobetaine, arsenocholine and inorganic arsenate in heart muscle and liver, and arsenobetaine and inorganic arsenate in pectoral muscle. Although arsenobetaine was the major form in all tissues, inorganic arsenate and arsenocholine accounted for 50% and 15% respectively of arsenic in aqueous extracts of the liver.

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