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.

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 .

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.

scholarly journals Arsenic Species Analysis at Trace Level by High Performance Liquid Chromatography with Inductively Coupled Plasma Mass Spectrometry

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Hongfang Hou ◽  
Wanjing Cui ◽  
Qing Xu ◽  
Zhanhui Tao ◽  
Yafei Guo ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Inductively Coupled Plasma ◽  
Mobile Phase ◽  
High Performance ◽  
Arsenic Species ◽  
Dimethylarsinic Acid ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

A sensitive and accurate simultaneous continuous analysis for six arsenic species including arsenobetaine (AsB), arsenocholine (AsC), monomethylarsonic acid (MMA), dimethylarsinic acid (DMA), arsenite (AsIII), and arsenate (AsV) has been developed by high performance liquid chromatography with inductively coupled plasma mass spectrometry (HPLC-ICP-MS). An anion-exchange column of Hamilton PRP-X100 (Switzerland) was applied for separation of the six arsenic species with gradient elution of 1.25 mmol/L Na2HPO4 and 11.0 mmol/L KH2PO4 as the mobile phase A and 2.5 mmol/L Na2HPO4 and 22.0 mmol/L KH2PO4 as the mobile phase B. The linearity ranges for AsB, AsC, MMA, DMA, AsIII, and AsV were between 0.5 and 50.0 μg/L, and the detection limits of the six arsenic species were all within 0.01–0.35 ng/L. The relative standard deviations (RSDs) were within 2.26–3.68% and the recovery rates of samples ranged from 95 to 103%. The proposed method was applied for the arsenic speciation analysis of sediment pore-water samples, which were taken from the supernatant after centrifugation and filtration.

scholarly journals Pharmacokinetic Properties of Arsenic Species after Intravenous and Intragastrical Administration of Arsenic Trioxide Solution in Cynomolgus Macaques Using HPLC-ICP-MS

Molecules ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 241 ◽  
Author(s):  
Qiaoli Shi ◽  
Mingyan Ju ◽  
Xiaoxia Zhu ◽  
Hui Gan ◽  
Ruolan Gu ◽  
...  
Keyword(s):  
Arsenic Trioxide ◽  
Inductively Coupled Plasma ◽  
High Performance ◽  
Cynomolgus Macaque ◽  
Arsenic Species ◽  
Dimethylarsinic Acid ◽  
Inductively Coupled ◽  
Monomethylarsonic Acid ◽  
Icp Ms ◽  
Plasma Mass Spectrometry

A rapid and sensitive method was established for arsenic (As) speciation based on high performance liquid chromatography coupled to inductively coupled plasma mass spectrometry (HPLC-ICP-MS). This method was validated for the quantification of four arsenic species, including arsenite (AsIII), arsenate (AsV), monomethylarsonic acid (MMAV) and dimethylarsinic acid (DMAV) in cynomolgus macaque plasma. Separation was achieved in just 3.7 min with an alkyl reverse phase column and highly aqueous mobile phase containing 20 mM citric acid and 5 mM sodium hexanesulfonate (pH = 4.3). The calibration curves were linear over the range of 5–500 ng·mL−1 (measured as As), with r > 0.99. The above method was validated for selectivity, precision, accuracy, matrix effect, recovery, carryover effect and stability, and applied in a comparative pharmacokinetic study of arsenic species in cynomolgus macaque samples following intravenous and intragastrical administration of arsenic trioxide solution (0.80 mg·kg−1; 0.61 mg·kg−1 of arsenic); in addition, the absolute oral bioavailability of the active ingredient AsIII of arsenic trioxide in cynomolgus macaque samples was derived as 60.9 ± 16.1%.

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