Determination of copper in traditional coffee pot water samples by flame atomic absorption spectrometry and matrix matching calibration strategy after switchable solvent based liquid-phase microextraction

Ercan, Maral Selin Fındıkoğlu; Ayyıldız, Merve Fırat; Chormey, Dotse Selali; Bakırdere, Sezgin

doi:10.1007/s10661-020-08729-w

Cited by 9 publications

(2 citation statements)

References 22 publications

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“…Nowadays, many different analytical techniques are used to determine the metal content of food samples, such as flame atomic absorption spectrometry [7], graphite furnace atomic absorption spectrometry [8], cold vapour atomic absorption spectrometry [9], inductively coupled plasma optical emission spectrometry [10], inductively coupled plasma mass spectrometry [11] and X-Ray fluorescence spectroscopy [12]. Among these techniques, FAAS is the preferred techniques in metal determinations due to its advantages, such as simplicity, speed, accurate and precision measurement [13].…”

Section: Introductionmentioning

confidence: 99%

Determination Essential and Toxic Metals in Bitter, Milk and White Chocolate Samples from Eight Different Manufacturers

Beyhan

Trak

Kabak

et al. 2021

Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Chocolate is consumed by people of all ages in every part of society. Chocolate is a very rich source of many essential metals for the body but it also may involve toxic metals. Therefore, the accurate and precise method should be selected and applied to determine the essential and toxic metals in the chocolate samples. In present study, Na, K, Mg (II), Ca(II), Cu(II), Fe(III), Zn(II), Cd(II), Cr(III), Pb(II) and Ni(II) metals were determined by using flame atomic absorption spectrometry (FAAS) in 24 different chocolate samples of 3 different types including 8 different brands of bitter, milk and white. The microwave-assisted digestion system was also used for the chocolate samples digestions. All results were given at 95% of confidence level. In addition, the accuracy of the method was also investigated by the analysis of a standard reference material (spinach leaves, NIST-1570a).

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Section: Introductionmentioning

confidence: 99%

Determination Essential and Toxic Metals in Bitter, Milk and White Chocolate Samples from Eight Different Manufacturers

Beyhan

Trak

Kabak

et al. 2021

Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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“…As we know, switchable-hydrophilicity solvents (SHS) are a kind of chemicals whose hydrophilicity and hydrophobicity can be regulated reversibly by CO 2 . Due to the reversible property, SHSs have been plenteously applied in recent years, such as extraction, micro-extraction, detection, and so forth. A switchable solvent with controllable hydrophilicity has obvious advantages in application in extraction and separation, where the sustainable process could be simply regulated by CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Sustainable Approach for Paraffin Wax Removal Using CO₂ Switchable Solvents

et al. 2021

Ind. Eng. Chem. Res.

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In this work, a sustainable approach for paraffin wax removal by using CO2 switchable-hydrophilicity solvents (SHSs) is developed, where paraffin wax exhibits better solubility in SHSs and can be simply separated by introducing CO2. Here, SHSs exhibit an excellent dissolving capacity for paraffin wax, especially, N,N-dimethylcyclohexylamine (DMCHA). All SHSs can effectively dissolve paraffin wax at a dissolution rate > 0.03 g/min. The detection using differential scanning calorimetry and the rheology behavior demonstrated that the decreased viscosity, melting points, and wax appearance temperature of paraffin wax in SHSs (especially in DMCHA) are lower than in traditional solvents, such as kerosene and petroleum ether, which contributes to improvement in the paraffin wax removal. Furthermore, the polarizing microscope images of paraffin wax reveal that the changed properties of paraffin wax in SHS are attributed to the dispersion of needle-shaped wax crystals in solvent. Interestingly, the paraffin wax is separated from SHS by introducing CO2, and the SHS is recovered under N2 at 65 °C after separating paraffin wax. Here, the recovery of paraffin wax can be improved by increasing water content, temperature, and aeration rate. Based on the molecular dynamics simulation, it is revealed that paraffin wax containing hydrocarbons (the main component of wax) with different alkane carbon numbers exhibits good dissolution behavior in DMCHA. After introducing CO2, the separation of paraffin wax is caused by the transformation from the hydrophobic state to the hydrophilic state of DMCHA.

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Detection of metals/metalloids and development of engineered plants to fight stress

Ahmad

Nawaz

Zafar

et al. 2022

Metals Metalloids Soil Plant Water Systems

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Determination of copper in traditional coffee pot water samples by flame atomic absorption spectrometry and matrix matching calibration strategy after switchable solvent based liquid-phase microextraction

Cited by 9 publications

References 22 publications

Determination Essential and Toxic Metals in Bitter, Milk and White Chocolate Samples from Eight Different Manufacturers

Determination Essential and Toxic Metals in Bitter, Milk and White Chocolate Samples from Eight Different Manufacturers

Sustainable Approach for Paraffin Wax Removal Using CO₂ Switchable Solvents

Detection of metals/metalloids and development of engineered plants to fight stress

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Determination of copper in traditional coffee pot water samples by flame atomic absorption spectrometry and matrix matching calibration strategy after switchable solvent based liquid-phase microextraction

Cited by 9 publications

References 22 publications

Determination Essential and Toxic Metals in Bitter, Milk and White Chocolate Samples from Eight Different Manufacturers

Determination Essential and Toxic Metals in Bitter, Milk and White Chocolate Samples from Eight Different Manufacturers

Sustainable Approach for Paraffin Wax Removal Using CO2 Switchable Solvents

Detection of metals/metalloids and development of engineered plants to fight stress

Contact Info

Product

Resources

About

Sustainable Approach for Paraffin Wax Removal Using CO₂ Switchable Solvents