Ultra-trace determination of bromine and iodine in rice by ICP-MS after microwave-induced combustion

Rondan, Filipe Soares; Hartwig, Carla A.; Novo, Diogo La Rosa; Moraes, Diogo Pompéu de; Cruz, Sandra M.; Mello, Paola A.; Mesko, Márcia F.

doi:10.1016/j.jfca.2017.12.023

Cited by 18 publications

(10 citation statements)

References 29 publications

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“…Thus, for IC analysis, ultrapure water and NH 4 OH solutions (50 mmol L −1 and 100 mmol L −1 ) were evaluated and, for ICP-MS analysis, ultrapure water and NH 4 OH solutions (50 mmol L −1 , 100 mmol L −1 , and 150 mmol L −1 ) were evaluated. The absorbing solutions used in this study were selected considering previous studies that recommend these solutions for halogens [ 30 , 32 , 34 ]. For this evaluation, recovery tests were performed by addition of a known analyte concentration (corresponding to 50% of the obtained concentration in the sample used for optimization) in the sample for each absorbing solution evaluated.…”

Section: Resultsmentioning

confidence: 99%

“…Decontamination of the quartz vessels and holders used in MIC method was performed using 6 mL of 65% (m/m) HNO 3 (Vetec, Brazil) followed by 6 mL of ultrapure water, according to previous works [ 28 – 30 ]. Small discs (approximately 12 mg, 15 mm of diameter) of filter paper (0.5% ash content, Qualy, J Prolab, Brazil) were used in combustion step, and LDPE films (80 × 80 mm) were used to wrap the samples [ 31 ].…”

Section: Methodsmentioning

confidence: 99%

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Determination of Halogens by Ion Chromatography in Edible Mushrooms after Microwave-Induced Combustion for Sample Preparation

Coelho

Rondan

Hartwig

et al. 2021

Journal of Analytical Methods in Chemistry

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In this study, the microwave-induced combustion (MIC) method was evaluated for the sample preparation of the most consumed mushroom species in Brazil (Champignon, Shiitake, and Shimeji) and further halogen determination by ion chromatography (IC). For this, sample mass, combustion aid mass, and absorbing solution (H2O and 50 mmol·L−1, 100 mmol·L−1, or 150 mmol·L−1 NH4OH) were evaluated. Bromine and iodine concentrations, determined by IC, were lower than the limits of detection (LODs, Br: 6 mg·kg−1 and I: 24 mg·kg−1). Inductively coupled plasma mass spectrometry (ICP-MS) was also used for Br and I determination, and the LODs were lower (Br: 0.066 mg·kg−1 and I: 0.014 mg·kg−1) than those obtained by IC. Concentrations of Cl, obtained by IC, ranged from 523 mg·kg−1 to 13053 mg·kg−1 with LOD of 40 mg·kg−1. In turn, Br and I concentrations, obtained by ICP-MS, ranged from 2.49 mg·kg−1 to 5.50 mg·kg−1 and from <0.014 mg·kg−1 to 0.047 mg·kg−1, respectively. Fluorine concentrations, determined by IC, were always lower than LOD (23 mg·kg−1). The trueness of the proposed methods was evaluated by recovery tests using standard solutions and a reference material (RM NIST 8435). When using the standard solution, recoveries ranged from 95% to 103% for halogen determination by IC and from 105% to 109% for Br and I determination by ICP-MS. When using the RM, recoveries of 102% for Cl by IC and of 87% and 86% for Br and I by ICP-MS, respectively, were obtained.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Determination of Halogens by Ion Chromatography in Edible Mushrooms after Microwave-Induced Combustion for Sample Preparation

Coelho

Rondan

Hartwig

et al. 2021

Journal of Analytical Methods in Chemistry

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“…Recently, several studies have demonstrated the advantages using IC-MS to determine elements such as bromine and iodine in their ionic forms (bromide and iodide) and in food matrices when combined with a suitable sample preparation method. 4,25,26 Bromine and iodine can be determined as bromide and iodide after the combustion method, according to the agreement using IC-MS and ICP-MS as well as the analysis of several certified reference material 3 and other matrices as shrimp, 2,29 rice, 5 and mushrooms. 33 Limits of quantification obtained by MIC and IC-MS in the present study were 0.4 mg kg −1 for bromine and 0.08 mg kg −1 for iodine, while LOQs obtained by MIC and ICP-MS were 0.3 mg kg −1 for bromine and 0.06 mg kg −1 for iodine.…”

Section: Bromine and Iodine Determination In Ediblementioning

confidence: 99%

New Analytical Strategy for Bioaccessibility Evaluation of Bromine and Iodine from Edible Seaweeds

Scaglioni

Balbinot

Rondan

et al. 2023

J. Agric. Food Chem.

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A strategy for determining the bioaccessibility of bromine and iodine from edible seaweeds was proposed for the first time using microwave-induced combustion (MIC) and ion chromatography coupled to mass spectrometry (IC-MS) after in vitro digestion. The concentrations of bromine and iodine in edible seaweeds using the proposed methods (MIC and IC-MS) were not statistically different from those using MIC and inductively coupled plasma mass spectrometry (p > 0.05). Trueness was assessed by recovery experiments (101–110%, relative standard deviation <10%). Following an in vitro digestion protocol, MIC was proposed as sample preparation for bioaccessible and residual fractions. Using this strategy, the mass balance totaled from 97 to 111%. No statistical difference (p > 0.05) was observed between the total concentration of bromine or iodine and their concentration in bioaccessible and residual fractions for three edible seaweed species, indicating full analyte quantification in the fractions.

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“…In these methods, the organic matrix is converted to the respective oxidation products 23 . Microwave‐induced combustion (MIC) is an example of this type of method, and it has been successfully applied to digest organic samples for subsequent determination of halogens and/or sulfur in several samples 15, 17, 24–30 . In the MIC method, solid samples are generally prepared as pellets or wrappers and positioned on a quartz holder, and the combustion is performed inside a quartz vessel pressurized with oxygen.…”

Section: Introductionmentioning

confidence: 99%

Ion chromatography coupled to mass spectrometry as a powerful technique for halogens and sulfur determination in egg powder and its fractions

Mesko

Toralles

Coelho

et al. 2020

Rapid Comm Mass Spectrometry

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Rationale To increase the consumption of egg powder and its fractions a suitable quality control method is required to obtain more information on its nutritional composition. The proposed method enables the quantification of important elements for the functioning of the human organism, such as halogens and sulfur, in egg powder and its fractions. Methods Up to 350 mg of egg powder or its fractions (egg white powder and egg yolk powder) were digested by microwave‐induced combustion using 20 bar pressure of oxygen. The analytes were absorbed in 100 mmol L−1 of NH4OH solution. The determination of halogens (chlorine, bromine, fluorine, and iodine) and sulfur was performed in a single analysis using ion chromatography with conductivity detection coupled to mass spectrometry. Results Using the proposed method, spike recoveries between 99% and 104% for all analytes were obtained, and results agreed with certified values of reference materials (agreements were between 100% and 109%). The relative standard deviations were below 8%. The variation in elemental concentration over a wide range in different fractions (whole egg powder, egg white powder, and egg yolk powder) and different brands was also observed. Conclusions The proposed method provides reliable information about minerals in whole egg powder and its fractions, contributing to better quality control of these products. Because these food products are widely consumed, these results suggest the safe ingestion levels of these elements.

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Ultra-trace determination of bromine and iodine in rice by ICP-MS after microwave-induced combustion

Cited by 18 publications

References 29 publications

Determination of Halogens by Ion Chromatography in Edible Mushrooms after Microwave-Induced Combustion for Sample Preparation

Determination of Halogens by Ion Chromatography in Edible Mushrooms after Microwave-Induced Combustion for Sample Preparation

New Analytical Strategy for Bioaccessibility Evaluation of Bromine and Iodine from Edible Seaweeds

Ion chromatography coupled to mass spectrometry as a powerful technique for halogens and sulfur determination in egg powder and its fractions

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