Preconcentration and determination of metal ions from fuel ethanol with a new 2,2′-dipyridylamine bonded silica

Vieira, Evanice Menezes Marçal; Soares, Isaac V.; Filho, Newton Luiz Dias; Silva, Niléia C. da; Garcia, Edemir F.; Bastos, Andréa C.; Perujo, Sérgio Daniel; Ferreira, Tamires T.; Rosa, André Henrique; Fraceto, Leonardo Fernandes

doi:10.1016/j.jcis.2012.08.073

Cited by 37 publications

(22 citation statements)

References 40 publications

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“…175,176,178 Several metals can also appear during the fuel storage and transport in metallic containers. [175][176][177][178][179] Finally, some metallic species can be used as additives to promote the combustion process. 180 Obviously, when a blend is considered (e.g., ethanol fuel) metals and metalloids come mainly from gasoline.…”

Section: Synthesis and Presence Of Metals Importance Of Their Determmentioning

confidence: 99%

“…Although ICP based techniques have been the most widely used to carry out the determination of metals and metalloids in ethanol fuel, alternative methods have been explored such as ETAAS, 175,[200][201][202][203][204][205]176,179,185,[206][207][208][209]183,210,211 ionic chromatography (IC) 178 and microwave plasma optical emission spectrometry (MIP-OES). 177 Several modiers have been used to carry out the determination of metals in bioethanol and ethanol fuel by ETAAS.…”

Section: Analysis By Other Techniquesmentioning

confidence: 99%

“…176,179,185,[207][208][209] Thus Alves et al 185 developed a method to determine Cd in ethanol fuel through FAAS using Moringa oleifera seeds as a on-line biosorbent to carry out sample preconcentration. The recoveries of three samples were from 97.5 to 100% and the LOD was 5.50 mg L À1 .…”

Section: Analysis By Other Techniquesmentioning

confidence: 99%

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Metal and metalloid determination in biodiesel and bioethanol

Sánchez¹,

Sanchez²,

Lienemann

et al. 2015

J. Anal. At. Spectrom.

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Section: Synthesis and Presence Of Metals Importance Of Their Determmentioning

confidence: 99%

Section: Analysis By Other Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Metal and metalloid determination in biodiesel and bioethanol

Sánchez¹,

Sanchez²,

Lienemann

et al. 2015

J. Anal. At. Spectrom.

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“…Considering the excess of water in this composition, we supposed these results were because the ionic strength of the samples of ethanol fuel. ) in these samples [14].…”

mentioning

confidence: 76%

Microemulsification-Based Method: Coupling with Separation Technique

Lima¹

2015

J Anal Bioanal Tech

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Abbreviations: ME: Microemulsion; AP: Amphiphile; W:Hydrophilic phase of dispersions; O: Hydrophobic phase of dispersions; Φ ME : Minimum volume fraction of amphiphile needed to get ME; Φ O : Volume fraction of oil to water; Φ E : Volume fraction of ethanol to water; Φ W : Volume fraction of water to ethanol; ΔΦ: Absolute error determined for Φ E Point-of-use devices represent currently a key field in quantitative analytical sciences. These platforms are low-cost, fast, portable, and simple to use eliminating the necessity for qualified operators [1]. Rapid tests enable in-situ measurements presenting substantial social and economic implications at industry, environment, and medicine [2][3][4][5][6][7][8][9]. One potential output to perform point-of-use analyses is the accomplishment of the tests in solution with naked eye detection using disposable systems. It allows the determination of different analytes from the use of modified nanomaterial [10]. Naked eye methods bypasses the use of instrumental readers, an essential feature for in-situ technologies. Furthermore, the analyses in solution surpass precisionrelated downsides when making the tests on substrates such as paper [6,9]. In this case, the diverse paper substrates that are employed to fabricate the devices affect the flow rates and interactions with analytes [10]. This paper reports further investigations and application of the microemulsification-based method (MEC), a point-of-use platform that was recently proposed by these authors [11]. It relies on solutionbased-detection with naked eyes. In contrast with colorimetric tools [10], MEC response depends on colloid thermodynamics by relying on effect of analyte on the entropy of emulsions or Winsor systems. It changes the formation of thermodynamically stable dispersions, the microemulsions (MEs). The minimum volume fraction of amphiphile (AP) needed to get MEs (Φ ME ) for a fixed water-oil ratio expressed the analytical signal of the method. The generation of nanodroplets in MEs (transparent) allows the naked eye detection of Φ ME by monitoring the change of turbidity from the emulsions or Winsor systems (cloudy) as shown in Figure 1a. This cloudy-to-transparent conversion acts like a turning point in titrations, ensuring the visual measurement of Φ ME and, therefore, not only screening analyses (positive/negative data) as the most of naked eye colorimetry platforms [10] as well as precise quantitative analyses [11]. The response in colorimetry changes with the intensity of colour or tonality. Herein, subjective uncertainties by personal and surrounding conditions are observed [12].MEC presents powerful aspects concerning the deployment of pointof-use tools. Such a method is straightforward, cheap, fast, portable, and provides precise analytical determinations with satisfactory precision, linearity, robustness, and accuracy. Lastly, volumes of approximately 20 µL for dispersions assure the visual measurement of Φ ME [11]. It contributes for a low sample consuming.The first outcomes achieved by MEC we...

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“…Neste sentido, o etanol, obtido a partir da cana de açúcar, é utilizado como um combustível alternativo no Brasil desde a década de 70 (OLIVEIRA et al, 2002;EYIDOGAN;OZSEZEN;CANAKCI, 2010), na forma hidratada, ou anidra quando misturado à gasolina, como estratégia na substituição do antidetonante chumbo tetraetila (MACEDO, 1998;ROSILLO-CALLE;CORTEZ 1998;VIEIRA et al, 2013). Embora, considerado por muitos, menos poluente que os combustíveis a base de petróleo, o etanol pode conter contaminantes orgânicos e inorgânicos (OLIVEIRA et al, 2002).…”

Section: Introductionunclassified

Sensor de pasta de nanotubos de carbono modificado com filme de bismuto para determinação de íons metálicos em etanol combustível

et al. 2015

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In the present study an anodic stripping voltammetric method using a bismuth film modified carbon nanotubes paste electrode for simultaneous determination of metals Zn 2+ , Cd 2+ and Pb 2+ in ethanol fuel is described. The metallic ions were preconcentrated on the bismuth film in the time and deposition potential of 500 s and -1.2 V and the stripping step was carried out by square wave voltammetry (frequency of 15 Hz, pulse amplitude of 25 mV and potential step of 5 mV). Acetate buffer at 0.1 mol L -1 concentration and pH 4.5 was used as support electrolyte.

show abstract

Preconcentration and determination of metal ions from fuel ethanol with a new 2,2′-dipyridylamine bonded silica

Cited by 37 publications

References 40 publications

Metal and metalloid determination in biodiesel and bioethanol

Metal and metalloid determination in biodiesel and bioethanol

Microemulsification-Based Method: Coupling with Separation Technique

Sensor de pasta de nanotubos de carbono modificado com filme de bismuto para determinação de íons metálicos em etanol combustível

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