Bromine and Iodine Determination in Edible Seaweed by Icp-MS After Digestion by Microwave-Induced Combustion

Mesko, Márcia F.; Toralles, Isis Gonçalves; Crizel, Marcelo Guerreiro; Costa, Vanize C.; Pires, Natanael Rodrigo Xavier; Pereira, Cláudio Martin Pereira de; Picoloto, Rochele S.; Mello, Paola A.

doi:10.5935/0100-4042.20140156

Cited by 5 publications

(14 citation statements)

References 1 publication

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“…Microwave-induced combustion (MIC) has been successfully applied for the decomposition of organic samples for further determination of halogens owing to the high efficiency of matrix oxidation and the possibility of using alkaline solutions for analyte absorption [17][18][19][20][21][22][23][24][25][26][27]. In this method, solid samples are generally prepared as pellets and positioned on a quartz holder, and combustion is performed inside a quartz vessel pressurized with oxygen, using microwave radiation and ammonium nitrate solution for the ignition step.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of ultra-trace determination of bromine and iodine in honey by ICP-MS using high sample mass in microwave-induced combustion

et al. 2015

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This work demonstrates the feasibility of ultra-trace determination of halogens in biological samples by inductively coupled plasma mass spectrometry (ICP-MS) after decomposition by microwave-induced combustion (MIC). The conventional MIC method was improved to allow the combustion of samples with mass higher than that used in previous works in order to achieve better limits of detection (LODs). The applicability of the proposed method for ultra-trace determination of bromine and iodine in organic samples was demonstrated here using honey. It was possible to decompose up to 1000 mg of honey using microcrystalline cellulose as a combustion aid and polyethylene film for sample wrapping. After combustion, analytes were absorbed using 50 mmol L(-1) NH4OH and recoveries for Br and I were between 99 and 104 %, and relative standard deviations were lower than 5 %. Microwave-assisted alkaline dissolution (MA-AD) was also evaluated for honey sample preparation using NH4OH or tetramethylammonium hydroxide solutions. However, the LODs for the MA-AD method were unsuitable because the high carbon content in digests required a dilution step prior to the analysis by ICP-MS. The LODs obtained by MIC were improved from 1143 to 34 ng g(-1) for Br and from 571 to 6.0 ng g(-1) for I, when compared to the MA-AD method. Furthermore, it was possible to decompose up to eight samples simultaneously in 30 min (including the cooling step) with very low reagent consumption and consequently lower generation of effluents, making MIC method well suited for routine ultra-trace determination of Br and I in honey. Graphical Abstract A high mass of honey was efficiently digested by MIC for subsequent Br and I determination by ICP-MS.

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Section: Introductionmentioning

confidence: 99%

Feasibility of ultra-trace determination of bromine and iodine in honey by ICP-MS using high sample mass in microwave-induced combustion

et al. 2015

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“…In addition to the listed advantages, it allows a reflux step after sample combustion, which can improve analyte recovery . Methods based on MIC have been used for further halogen determination in food samples. ,,− …”

Section: Introductionmentioning

confidence: 99%

Bromine and Iodine Contents in Raw and Cooked Shrimp and Its Parts

Mesko

Toralles

Hartwig

et al. 2016

J. Agric. Food Chem.

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The concentration of bromine and iodine was determined in shrimp and its parts (tissue and shells), and changes in the analyte concentration were evaluated after the cooking procedure. Bromine and iodine concentrations were determined by a method recently developed by our research group based on microwave-induced combustion for sample preparation and inductively coupled plasma mass spectrometry for analyte determination. The accuracy was evaluated using a reference material (NIST 8414) that was digested using the proposed method. No statistical difference was observed between certified and determined values (Student's t test, 95% confidence level). Suitable limits of detection (Br, 0.02 μg g(-1) and I, 0.01 μg g(-1)) were obtained for both analytes. Higher concentrations of both analytes were observed in shrimp shells in comparison to shrimp tissue for raw and cooked samples. Moreover, losses of Br and I (between 24 and 43%) were observed after cooking.

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“…The vessels were positioned in an oven rotor and subjected to 20 bar of oxygen pressure, and the rotor containing the vessels was placed inside the microwave cavity. The microwave heating program used for sample preparation by MIC was as follows: (i) 1400 W for 5 min and (ii) 0 W for 20 min (cooling step) . After combustion, the pressure in each vessel was released and the digests were adjusted to 20 mL with ultrapure water in volumetric flasks and subjected to bromine and iodine determination by IC-MS and by ICP-MS.…”

Section: Methodsmentioning

confidence: 99%

“…Around 500 mg of each sample mass of edible seaweed and their residual fractions used (obtained after the in vitro digestion protocol) were considered, according to the previous study presented in the literature. 3 On the other hand, the volume used of the bioaccessible fraction obtained after the in vitro digestion protocol was also evaluated due to the need for a combustion aid to achieve its efficient decomposition. Considering its high moisture content, the sample volume of the bioaccessible fraction was evaluated.…”

Section: Sample Preparation Of Edible Seaweeds and Their Fractions Af...mentioning

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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Bromine and Iodine Determination in Edible Seaweed by Icp-MS After Digestion by Microwave-Induced Combustion

Cited by 5 publications

References 1 publication

Feasibility of ultra-trace determination of bromine and iodine in honey by ICP-MS using high sample mass in microwave-induced combustion

Feasibility of ultra-trace determination of bromine and iodine in honey by ICP-MS using high sample mass in microwave-induced combustion

Bromine and Iodine Contents in Raw and Cooked Shrimp and Its Parts

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

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