Determination of bromine and iodine in edible flours by inductively coupled plasma mass spectrometry after microwave-induced combustion

Silva, Jussiane S.; Diehl, Lisarb O.; Frohlich, Angelica C.; Costa, Vanize C.; Mesko, Márcia F.; Duarte, Fábio A.; Flores, Érico M.M.

doi:10.1016/j.microc.2017.03.031

Cited by 18 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In view of the suitable recoveries for all halogens by IC, the 100 mmol L −1 NH 4 OH was selected as method condition. This fact corroborates with some studies reported in the literature, which mention that 100 mmol L −1 NH 4 OH is a suitable solution for further halogen determination by IC [ 26 , 31 , 36 ].…”

Section: Resultssupporting

confidence: 92%

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

View full text Add to dashboard Cite

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.

show abstract

Section: Resultssupporting

confidence: 92%

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

View full text Add to dashboard Cite

show abstract

“…However, disadvantages associated to interferences due to the high carbon content in solution (MAE), the use of relatively low sample mass (oxygen flask), and low throughput (pyrohydrolysis, oxygen flask and combustion bomb) (11) can be cited. In order to overcome these drawbacks, microwaveinduced combustion (MIC) has been proposed for an effective digestion of several matrices (16)(17)(18). The MIC method involves the use of quartz holder containing a sample pellet, a disc of filter paper, and the use of 50 µL of 6 mol L -1 NH4NO3 igniter solution, which is introduced inside a quartz vessel.…”

Section: Introductionmentioning

confidence: 99%

Chlorine determination in medicinal plants by potentiometry with ion-selective electrode after microwave-induced combustion

et al. 2021

View full text Add to dashboard Cite

A method based on microwave-induced combustion (MIC) was applied for medicinal plants digestion allowing further chlorine determination by potentiometry using ion-selective electrode (ISE). Sample masses ranging from 500 to 1000 mg were evaluated for MIC digestion. Water and 10, 25, 50, and 100 mmol/L NH4OH were investigated as absorbing solutions. The accuracy of the proposed method was evaluated by using certified reference materials (CRMs), by recovery tests (500 µg/g), and also by comparison with the results obtained by inductively coupled plasma optical emission spectrometry (ICP-OES) after microwave-assisted alkaline extraction (MAE). Using water or NH4OH solutions (10 to 100 mmol/L), recoveries close to 100% and relative standard deviation lower than 5% were obtained. Results were in agreement with CRMs values (better than 95%) and also with those values obtained by using the MAE method. The main advantage of the proposed method was the complete combustion of high sample mass (1000 mg) resulting in low quantification limit (12.5 µg/g) and chlorine determination at low concentration by ISE. Another advantage of the proposed method was the high chlorine stability in digests (up to 30 days of storage) even using water as absorbing solution, which is in agreement with green analytical chemistry recommendations. Finally, the proposed MIC method was applied for commercial medicinal plants and the chlorine concentration was in the range of 59.4 ± 1.4 to 2038 ± 70 µg/g. The proposed MIC method was considered suitable for quality control for chlorine determination in medicinal plants.

show abstract

“…The losses of volatile species could not be avoided even using closed vessels because of the inherent property of halogens . Some extraction procedures using alkaline solutions as extractant have also been developed to detect bromine and iodine . To reduce the interferences from extractant, the matrix‐matching calibration method is often used.…”

Section: Introductionmentioning

confidence: 99%

Direct analysis of bromine and iodine in dried serum spots by laser ablation inductively coupled plasma mass spectrometry

Han

et al. 2020

Rapid Comm Mass Spectrometry

View full text Add to dashboard Cite

Rationale: Accurate quantitative analysis of bromine and iodine in serum is an important aspect of monitoring body condition, but the volatile loss of halogen in sample pretreatment is a troublesome problem. We present a validated and flexible high-throughput method for quantification of bromine and iodine in dried serum spots (DSS) using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and an external aqueous standard calibration curve. The influence of serum matrix and laser ablation (LA) conditions on the analysis of bromine and iodine in DSS was researched systematically.Methods: Aqueous standards without matrix matching were used for calibration to analyze bromine and iodine in serum by LA-ICP-MS. 5-μL volumes of the aqueous standard solution and serum samples in 10 times diluted concentration were deposited on the PTFE paper to form dried standard calibration spots (DSCS) and DSS, of less than 2 mm in diameter. LA was performed using a focused Nd:YAG laser beam in raster lineal scan mode. Results:The limits of detection (LODs) for bromine and iodine in DSS were 0.23 and 0.03 mg L −1 , respectively. The relative standard deviation (RSD) for this method was less than 10%. The samples were also detected with matrix matching calibration by ICP-MS. The accuracy of the method was verified by statistical analysis of these results from ICP-MS and LA-ICP-MS. The accuracy is satisfactory with recoveries ranging from 81.5% to 118%. Conclusions:A novel and simple approach for high-throughput screening of bromine and iodine in DSS has been established by LA-ICP-MS. Calibration could be achieved using an aqueous standard solution instead of a matrix-matching solution. The method allowed analysis of low-volume biological samples without derivatization and decreased the risk of contamination or loss.

show abstract

Determination of bromine and iodine in edible flours by inductively coupled plasma mass spectrometry after microwave-induced combustion

Cited by 18 publications

References 28 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

Chlorine determination in medicinal plants by potentiometry with ion-selective electrode after microwave-induced combustion

Direct analysis of bromine and iodine in dried serum spots by laser ablation inductively coupled plasma mass spectrometry

Contact Info

Product

Resources

About