Iodometric Determination of Hydroperoxides in Hydrocarbon Autoxidation Reactions Using Triphenylphosphine Solution as a Titrant: A New Protocol

Roohi, Hossein; Rajabi, Mehrdad

doi:10.1021/acs.iecr.7b05403

Cited by 7 publications

(5 citation statements)

References 29 publications

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“…The organic peroxides produced during the oxidation of the different blends were quantified by triphenylphosphine iodometric titration, based on the new method proposed by Roohi and Rajabi [31]. In this method, TPP solution was used as titrant for iodine liberated from the reaction of peroxide with iodide ions.…”

Section: Hydroperoxide Quantificationmentioning

confidence: 99%

“…A recrystallization of organic TPP from a solution in hot ethanol at 80 °C is recommended to remove the impurity [31]. The TPP titrant solution (0.08 M in n-decane) was prepared by adding 2.10 g of purified TPP and 0.01 g of antioxidant Butylated hydroxytoluene (BHT) to avoid air oxidation, into a 100 mL volumetric flask.…”

Section: Hydroperoxide Quantificationmentioning

confidence: 99%

“…Numerous analytical techniques such as Gas Chromatography (GC) [26], High-Performance Liquid Chromatography (HPLC) [27], [28], Thin Layer Chromatography (TLC), polarography [29] and NMR techniques [30] have been developed to determine the organic peroxides (ROOHs). These methods are expensive, time consuming and require a control of ambient oxygen [31]. The standard method to quantify the total quantity of hydroperoxides in conventional fuels consists in the oxidation by ROOHs of iodide ions Ito iodine I 2 which is then quantified by titration with a sodium thiosulfate solution in presence of starch as a colour indicator [32] [33]:…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a new analytical method has been proposed by Roohi and Rajabi [31]. They used TPP as a titrant for the iodine liberated from the reaction of peroxides with iodide ions.…”

Section: Introductionmentioning

confidence: 99%

“…This paper presents the first quantitative results measuring the effect of adding n-butanol, diethyl ether (DEE), cyclopentanone and cyclohexane on the oxidation stability of n-decane. Quantification of peroxides produced during the auto-oxidation of theses blends, at the IP, was systematically performed using the latest iodometric titration method of the literature (with TPP) [31].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Comparison of the Effects of Different Biofuels on the Oxidation Stability of a Hydrocarbon Fuel

El-Sayah¹,

Glaude²,

Fournet³

et al. 2020

SAE Technical Paper Series

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In this work, the effects of the addition of biofuels belonging to different chemical families on the oxidation stability of a conventional fuel surrogate (n-decane) have been investigated. Experiments have been performed in a PetroOxy apparatus, which is one of the reference Rapid Small Scale Oxidation Test of the ASTM 7545 methods. When the pressure in the cell of the device decreases by 10% of the maximum pressure recorded, the time measured to reach this target value defines the Induction Period (IP). IP constitutes a quantitative measure of the oxidation stability of the fuel. In addition to the IP measurements for each biofuel / hydrocarbon fuel blend, organic peroxides produced in the liquid sample were quantified at the IP, using iodometric titration and ultraviolet-visible spectrophotometry.Different oxygenated biofuels have been studied in this work: diethyl ether, n-butanol, and cyclopentanone. Cyclohexane addition has also been considered to probe the effects of a non-oxygenated additive. For each type of biofuel, the proportion added to n-decane, the surrogate fuel, was varied from 0.2 to 20%vol. For each blend, the IP and the total peroxide content in the liquid have been systematically measured.This study demonstrates an unexpected diversity of the effects of oxygenates biofuels: n-butanol strongly enhances the oxidation stability of the surrogate fuel (up to a factor of 6) while diethyl ether and cyclopentanone decrease the stability of n-decane. The experimental results show also that variations in the proportions of biofuel additives lead to non-linear variations in the measured IPs. Organic peroxide measurements confirmed that a similar reaction mechanism underpins the oxidation of all the biofuel/fuel surrogate blends.

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Section: Hydroperoxide Quantificationmentioning

confidence: 99%

Section: Hydroperoxide Quantificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Recently, a new analytical method has been proposed by Roohi and Rajabi [31]. They used TPP as a titrant for the iodine liberated from the reaction of peroxides with iodide ions.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of the Effects of Different Biofuels on the Oxidation Stability of a Hydrocarbon Fuel

El-Sayah¹,

Glaude²,

Fournet³

et al. 2020

SAE Technical Paper Series

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Laser-induced formation of Au/Pt nanorods with peroxidase mimicking and SERS enhancement properties for application to the colorimetric determination of H2O2

Sun

Gao

et al. 2018

Microchim Acta

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Platinum nanoparticles (PtNPs) were uniformly grown on the surface of gold nanorods (AuNRs) by a laser irradiation procedure. Transmission electron microscopy confirmed that the PtNPs are uniformly grown on the surface of the AuNRs. The formation of PtNPs on the AuNRs leads to a red-shift of the absorption maximum from 734 nm to 766 nm. In addition, the efficiency of surface enhanced Raman scattering (SERS) is increased, but the photothermal conversion efficiency is decreased compared to pure AuNRs. The result indicates that electron transfer occurs between gold and platinum. The peroxidase mimicking effect of PtNPs, AuNRs and Au/Pt NRs by catalyzing the oxidation of colorless 3,3',5,5'-tetramethylbenzidine (TMB) to blue oxidized 3,3',5,5'-tetramethylbenzidine (oxTMB; a quinone) in the presence of HO. The catalytic activity of Au/Pt NRs is higher than that of sole AuNRs or PtNPs by factors of 4.2 and 2.1, respectively. Thus, Au/Pt NRs have been used for the detection of peroxide and the limit of detection is 0.04 μM. This work provides an approach to integrate the peroxidase mimicking effect with SERS enhancement for potential application in detection. Graphical abstract A schematic diagram for the laser-induced growth of Au/Pt NRs and the colorimetric determination of hydrogen peroxide concentration with their peroxidase mimicking properties. The limit of detection is 0.04 μM based on the use of Au/Pt NRs as a catalyst.

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Triphenylphosphine in the identification of oxidation products of organic compounds with molecular oxygen and peroxides

Perkel,

Voronina

2024

Russ Chem Bull

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Iodometric Determination of Hydroperoxides in Hydrocarbon Autoxidation Reactions Using Triphenylphosphine Solution as a Titrant: A New Protocol

Cited by 7 publications

References 29 publications

Comparison of the Effects of Different Biofuels on the Oxidation Stability of a Hydrocarbon Fuel

Comparison of the Effects of Different Biofuels on the Oxidation Stability of a Hydrocarbon Fuel

Laser-induced formation of Au/Pt nanorods with peroxidase mimicking and SERS enhancement properties for application to the colorimetric determination of H2O2

Triphenylphosphine in the identification of oxidation products of organic compounds with molecular oxygen and peroxides

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