The interference standard method: evidence of principle, potentialities and limitations

Amais, Renata S.; Nóbrega, Joaquim A.; Donati, George L.

doi:10.1039/c4ja00052h

Cited by 14 publications

(29 citation statements)

References 18 publications

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“…It also shows the efficiency of the IFS method at minimizing spectral interferences and improving accuracy. As demonstrated in previous works (Donati et al, 2011 , 2012a ; Amais et al, 2014 ), the 38 Ar + IFS ion has a similar behavior to the 28

ion, and when their signal ratio is used for calibration, the interfering effect is significantly reduced.…”

Section: Non-traditional Calibration Methods Applied To Icp-mssupporting

confidence: 56%

“…It relies on the hypothesis that interfering ions and naturally-occurring IFS species such as 36 Ar + , 36 ArH + , and 38 Ar + present similar behaviors in the plasma (Donati et al, 2011 ). Additional evidence of this principle has been provided in a recent work using high-resolution sector field ICP-MS measurements (Amais et al, 2014 ). Different from a conventional internal standardization method, the IFS strategy considers correcting variations in the interfering signal rather than in the analytical signal.…”

Section: Non-traditional Calibration Methods Applied To Icp-msmentioning

confidence: 71%

“…From Equation (1), one can infer that the larger the variation in the interfering ion signal ( V I ) and the larger the S I / S A ratio, the worse the analyte recoveries (Donati et al, 2011 ; Amais et al, 2014 ). In the example of Si determination discussed earlier, V I might have been negative, i.e., the interfering ion signal was lower when the sample was analyzed than when its corresponding standard solution was run, which resulted in a negative R (%) .…”

Section: Non-traditional Calibration Methods Applied To Icp-msmentioning

confidence: 99%

See 2 more Smart Citations

Traditional Calibration Methods in Atomic Spectrometry and New Calibration Strategies for Inductively Coupled Plasma Mass Spectrometry

Carter¹,

Barros²,

Nóbrega³

et al. 2018

Front. Chem.

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ion, and when their signal ratio is used for calibration, the interfering effect is significantly reduced.…”

Section: Non-traditional Calibration Methods Applied To Icp-mssupporting

confidence: 56%

Section: Non-traditional Calibration Methods Applied To Icp-msmentioning

confidence: 71%

Section: Non-traditional Calibration Methods Applied To Icp-msmentioning

confidence: 99%

See 1 more Smart Citation

Traditional Calibration Methods in Atomic Spectrometry and New Calibration Strategies for Inductively Coupled Plasma Mass Spectrometry

Carter¹,

Barros²,

Nóbrega³

et al. 2018

Front. Chem.

Self Cite

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“…All the traditional calibration methods previously mentioned present drawbacks for analysis of complex samples, being in some cases necessary the application of other strategies such as multivariate calibration [25][26][27][28][29] and matrix-matching procedures. [30][31][32] Since 2011, nontraditional calibration methods, such as standard dilution analysis (SDA), [30][31][32][33] interference standard method (ISM) [34][35][36] and multi-energy calibration (MEC), 37 have been applied for quantitative analysis by inductively coupled plasma (ICP) optical emission spectrometry (OES), high-resolution continuum source (HR-CS) flame atomic absorption spectrometry (FAAS), ICP-mass spectrometry (MS) and microwave induced plasma (MIP) with OES.…”

Section: Introductionmentioning

confidence: 99%

Combination of Multi-Energy Calibration (MEC) and Laser-Induced Breakdown Spectroscopy (LIBS) for Dietary Supplements Analysis and Determination of Ca, Mg and K

Augusto

Castro

Sperança

et al. 2018

J. Braz. Chem. Soc.

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This study describes the application of laser-induced breakdown spectroscopy (LIBS) for the direct determination of Ca, K and Mg in powdered dietary supplements. Multi-energy calibration (MEC) method was applied to obtain a calibration curve. With MEC, it was possible to observe spectral interferences and select adequate emission lines from LIBS. For Ca and Mg, five lines were selected and for K just two lines among four could be selected (compromising the results). The trueness for dietary supplements ranged from 81 to 103% for Ca and 74 to 106% for Mg. For K, just the samples S3 (95%) and S5 (109%) showed acceptable trueness values. In the case of Ca and K, besides the MEC, the normalization using C as internal standard also improved the figure of merit results. The MEC and normalization processes showed that possible matrix effect and spectral interferences could be avoided, and the results of trueness and precision were satisfactory.

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“…10,11 For this procedure, the samples were prepared as emulsions. The developed procedure has allowed the determination of the total sulfur content with limit of detection (LOD) and limit of quantification (LOQ) of 0.72 and 2.4 μg g -1 , 6 respectively.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Sulfur Content in Diesel/Biodiesel Blends Using LED-Induced Fluorescence Associated with Multivariate Calibration

Campos

Quintella

Meira

et al. 2017

J. Braz. Chem. Soc.

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The present paper concerns to predict the sulfur concentration in biodiesel/diesel blends in the range of 5-100 mg L -1 of sulfur using spectrofluorimetry and partial least squares multivariate calibration (PLS). The calibration set consisted of samples with 10 and 20% (B10 and B20) of biodiesel in diesel with sulfur addition of 5-100 mg L -1. Two PLS models were constructed, one to predict the concentrations of sulfur in B10 blends that presented coefficient of determination (R 2 ) values of 0.9867377 and 0.9801064, respectively, for calibration and validation. The other PLS model predict the concentrations of sulfur in B20 that presented R 2 values of 0.9949219 and 0.8573713, respectively, for calibration and validation. Therefore, the models showed adequate efficiency to predict changes in the concentration of sulfur in biodiesel/diesel blends B10 and B20.Keywords: biodiesel, multivariate analysis, spectrofluorimetry, sulfur, diesel IntroductionUntil recently, one of the main problems regarding to the emission of particulate matter was the high sulfur content in diesel fuel commercialized by the Brazilian automotive industry.1 Sulfur oxides are classified as emission compounds which pose a risk to human health; however, they are subject to regulations.2 In Brazil, to reduce the atmospheric pollution caused by the sulfur present in the petroleum derivative, this fuel has been produced with a lower sulfur content, gradually passing from S1800 (1800 mg kg -1 of sulfur) to S500 (500 mg kg -1 of sulfur), followed by S50 (50 mg kg -1 of sulfur) to S10 (10 mg kg -1 of sulfur). 3Diesel fuel is mainly composed of alkanes with 10 to 20 carbon chains, therefore, consisting mostly of long-chain saturated hydrocarbons. They also have aromatic compounds, alkylated cycloalkanes, and even compounds that feature heteroatoms, such as sulfur, nitrogen and oxygen. Benzothiophenes and dibenzothiophenes are among the sulfur compounds found in diesel fuel. 4 There are reports of the determination of sulfur content in fuels using different analytical methods, namely: energydispersive X-ray fluorescence, inductively coupled plasma optical emission spectrometry (ICP OES), inductively coupled plasma mass spectroscopy, atomic absorption spectroscopy and X-ray fluorescence spectrometry. With the results obtained it was possible to conclude that high sulfur containing diesel fuels were from heavy diesel engines and diesel fuel-like liquids obtained by thermal degradation of waste polymers. 5There are also procedures using inductively coupled plasma optical emission spectrometry (ICP OES).6,7 The norms ISO 20884:2004 8 and ISO 20846:2011 9 are used to determine sulfur content of automotive fuels using wavelength-dispersive X-ray fluorescence spectrometry and ultraviolet fluorescence method.It was developed a procedure for the determination of total sulfur in petroleum and derivatives using ICP OES. 10,11 For this procedure, the samples were prepared as emulsions. The developed procedure has allowed the determination of the total sulfur ...

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The interference standard method: evidence of principle, potentialities and limitations

Abstract: High resolution sector field ICP-MS (SF-ICP-MS) is used to explore the mechanisms and limitations of the interference standard (IFS) method.

Cited by 14 publications

References 18 publications

Traditional Calibration Methods in Atomic Spectrometry and New Calibration Strategies for Inductively Coupled Plasma Mass Spectrometry

Traditional Calibration Methods in Atomic Spectrometry and New Calibration Strategies for Inductively Coupled Plasma Mass Spectrometry

Combination of Multi-Energy Calibration (MEC) and Laser-Induced Breakdown Spectroscopy (LIBS) for Dietary Supplements Analysis and Determination of Ca, Mg and K

Prediction of Sulfur Content in Diesel/Biodiesel Blends Using LED-Induced Fluorescence Associated with Multivariate Calibration

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