Magnetic solid phase extraction as a nonchromatographic method for the quantification of ultratrace inorganic arsenic in rice by inductively coupled plasma-optical emission spectrometry (ICP OES)

Francisco L F da Silva; Francisco E H Lima; Davino M Andrade Neto; Fernando L de Menezes; Lillian M U D Fechine; Abdullah Akhdhar; Livia P D Ribeiro; Ana R A Nogueira; Pierre B A Fechine; Gisele S Lopes; Wladiana O Matos

doi:10.1016/j.foodchem.2023.135461

Magnetic solid phase extraction as a nonchromatographic method for the quantification of ultratrace inorganic arsenic in rice by inductively coupled plasma-optical emission spectrometry (ICP OES)

Food Chem. 2023 Jun 30:412:135461. doi: 10.1016/j.foodchem.2023.135461. Epub 2023 Jan 16.

Affiliations

¹ Laboratory of Applied Chemistry Study, Department of Analytical Chemistry and Physical Chemistry, Science Center, Pici Campus, Federal University of Ceara, 60455-760 Fortaleza, CE, Brazil.
² Grupo de Química de Materiais Avançados (GQMat), Department of Analytical Chemistry and Physical-Chemistry, Science Center, Pici Campus, Federal University of Ceara, 60455-760 Fortaleza, CE, Brazil; Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE) - Campus Camocim, 62400-000 Camocim, CE, Brazil.
³ Grupo de Química de Materiais Avançados (GQMat), Department of Analytical Chemistry and Physical-Chemistry, Science Center, Pici Campus, Federal University of Ceara, 60455-760 Fortaleza, CE, Brazil.
⁴ Department of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia.
⁵ Núcleo Avançado de Tecnologias Analíticas (NATA), Instituto de Ciências Exatas e da Terra, Universidade da Integração Internacional da Lusofonia Afro-brasileira, Campus dos Palmares, Km 51, Acarape, CE CEP 62785-000, Brazil.
⁶ EMBRAPA Pecuária Sudeste, P.O. Box 339, 13560-970 São Carlos, SP, Brazil.
⁷ Laboratory of Applied Chemistry Study, Department of Analytical Chemistry and Physical Chemistry, Science Center, Pici Campus, Federal University of Ceara, 60455-760 Fortaleza, CE, Brazil. Electronic address: wladianamatos@ufc.br.

PMID: 36731230
DOI: 10.1016/j.foodchem.2023.135461

Abstract

An alternative analytical method was developed for the quantification of inorganic arsenic (iAs) in rice by ICP OES. Iron nanoparticles modified with an organophosphorus compound were used as the solid phase for MSPE of iAs from the plant matrix. The MSPE procedure was performed using 4 mL of a buffer solution with pH 4.0, 20 mg of the nanomaterial, and a 15-min extraction time. The total As (tAs) by ICP OES was also quantified using the same MSPE procedure after solubilization of the samples by a block digester. The accuracy of tAs and iAs quantification was verified using CRM NIST 1568b (97 % and 101 % recovery, respectively). The precision (RSD < 15 %) and LOD and LOQ (1.08 and 3.70 µg kg^-1, respectively) of the proposed method were satisfactory. The rice samples had tAs contents between 0.090 and 0.295 mg kg^-1 and iAs mass fractions between 0.055 and 0.109 mg kg^-1.

Keywords: Arsenic speciation; ICP OES; Magnetic solid phase extraction; Nanomaterials; Nonchromatographic methods; Rice.

MeSH terms

Arsenic* / analysis
Arsenicals*
Magnetic Phenomena
Oryza* / chemistry
Solid Phase Extraction / methods
Spectrum Analysis

Substances

Arsenic
Arsenicals