On-line speciation analysis of arsenic compounds in commercial edible seaweed by HPLC-UV-thermo-oxidation-HG-AFS

被引：11
作者：
Camurati, Julieta R. [1 ]
Londonio, Agustin [1 ,2 ]
Smichowski, Patricia [2 ,3 ]
Salomone, Vanesa N. [1 ]
机构：
[1] UNSAM, CONICET, Inst Invest & Ingn Ambiental IIIA, Campus Miguelete,25 Mayo Francia, RA-1650 San Martin, Buenos Aires, Argentina
[2] Comision Nacl Energia Atom, Gerencia Quim, Ave Gral Paz 1499,B1650KNA, San Martin, Buenos Aires, Argentina
[3] Consejo Nacl Invest Cient & Tecn CONICET, Ave Godoy Cruz 2290,C1425FQB, Buenos Aires, DF, Argentina
来源：
FOOD CHEMISTRY | 2021年 / 357卷
关键词：
Arsenic speciation; Atomic fluorescence spectrometry; Sea lettuce; Seaweed; PLASMA-MASS SPECTROMETRY; ICP-MS; ALGAE; WATER; ARSENOSUGARS;
D O I：
10.1016/j.foodchem.2021.129725
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Arsenic speciation analysis in dried seaweeds was carried out using an on-line HPLC-UV-thermo-oxidation-HGAFS system. Species separated and quantified were: arsenite [As(III)], arsenate [As(V)], monomethylarsonic acid (MMA), dimethylarsinic acid (DMA) and different arsenosugars. Extraction efficiency ranged between 38 and 83%. Chromatographic separation was achieved in gradient elution mode using (NH4)2CO3 as mobile phase in the pH range 9-10.3. Total As concentration was quantified by ICP-MS after microwave digestion. Limits of detection were in the range 3.0 to 6.0 ng g-1 for the species under study based on peak height and the relative standard deviation was <8% at 10 mu g L-1 As. The accuracy of the procedure was verified by analyzing the CRM BCR-279 Ulva lactuca. Results for total As were in agreement with the certified values. The HPLC-(UV)-HG-AFS system resulted suitable for quantification of eight As compounds. Results showed that arsenosugars are the most abundant compounds in the investigated seaweeds.
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页数：6
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