Determination of fatty acid methyl esters in cosmetic castor oils by flow injection–electrospray ionization–high‐resolution mass spectrometry

Negrete, Missael Antonio Arroyo; Aguilar, Francisco Javier Acevedo; Barrientos, Eunice Yáñez; Escobosa, Alma Rosa Corrales; Wróbel, Katarzyna

doi:10.1111/ics.12465

Cited by 8 publications

(3 citation statements)

References 21 publications

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“…The difference could also be related to varied anionic head group contributions with the sodium sulfonate group in SEFAMESO contributing 11 and sodium sulfate in SDS contributing 38.7 . The HLB value of SEFAMESO suggested that the synthesized surfactant is potentially suitable for use as a wetting or solubilizing agent in the formulation of shampoos. , Studies have also shown that mixed surfactant systems derived from edible oleochemical fatty methyl esters have excellent properties in the formulation of stable food emulsifiers as well as enhanced ability to form complex condensed films at liquid–liquid interfaces, including formulation of cosmetics, herbicides, and drugs. , This, therefore, suggests that the SEFAMESO surfactant ought to be explored beyond the potential use as a cleansing agent to drug formulation, among other applications.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Evaluation of Solution Properties of Sesame Fatty Methyl Ester Sulfonate Surfactant

Kipkemboi

Rop

2020

ACS Omega

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The search for alternative, biodegradable, and sustainable raw materials to replace finite petrochemicals is an area of great interest. Triglycerides obtained from oilseed crops are such potential raw materials. In this study, sesame oil was trans-esterified to sesame fatty methyl esters (SEFAMEs) that were used as precursors in the synthesis of sesame fatty methyl esters sulfonate (SEFAMESO) surfactant. SEFAME and SEFAMESO surfactants were characterized by high-performance liquid chromatography–mass spectrometry (HPLC-MS), 1H NMR, and Fourier transform infrared (FTIR) spectra. HPLC-MS, 1H NMR, and FTIR spectra indicated successful trans-esterification and conversion of SEFAMEs to SEFAMESO. Solution properties of the SEFAMESO surfactant including hydrophilic–lipophilic balance (HLB) value, Krafft point, foam-ability, critical micelle concentration (CMC), counterion degree of binding and thermodynamic parameters such as ΔG°mic, ΔH°mic, ΔS°mic, ΔH°mic,* and T C were evaluated. The CMC values of SEFAMESO at 298.15 K were relatively lower than that of the sodium dodecyl sulfate (SDS) standard, and these values decreased to a minimum at 303.15 K and then increased with an increase in temperature. ΔG°mic values were negative indicating a spontaneous micellization process. ΔH°mic and ΔS°mic values revealed that micellization was entropy-driven at low temperatures and both entropy- and enthalpy-driven at high temperatures. ΔH°mic,* values were negative suggesting formation of stable micelles. The evaluated properties revealed the potential application of the synthesized surfactant as a cleansing agent.

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Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization, and Evaluation of Solution Properties of Sesame Fatty Methyl Ester Sulfonate Surfactant

Kipkemboi

Rop

2020

ACS Omega

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“…Apart from these, many antenna sensors have been designed for air quality monitoring, medical checkup, food analysis, etc. [27][28][29]. However, all these methods are considered to be time-consuming with some complex procedure and complicated data interpretation, which require skilled operators to handle and use these microstripbased antenna sensors.…”

Section: Introductionmentioning

confidence: 99%

Exploration of adulteration in common raw spices using antenna-based sensor

Nitika

Kaur

Khanna

2022

Int. J. Microw. Wireless Technol.

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The ability of food products to store and dissipate electromagnetic energy is determined by the material's dielectric properties. In relation to this phenomenon, a non-destructive technique is presented for food evaluation based on the shift in resonant frequency and reflection coefficient magnitude value of the proposed slot-loaded microstrip line-fed antenna-based sensor caused by the change in dielectric properties of the food material. In this work, a miniaturized antenna sensor of 10 × 10 mm2 size comprised of a dielectric substrate FR-4 with permittivity (εr) = 4.4 having ground plane at the bottom and a radiating element at the top is designed to operate at 13.3 GHz. Three samples of spices, i.e. red chilli powder, black pepper powder, and turmeric powder, are considered for quality monitoring whose relationship in terms of reflection coefficient, resonant frequency, and dielectric permittivity at 13.17, 12.61, and 13.09 GHz respectively is analyzed. Further, second-order polynomial model is derived to predict dielectric permittivity of the material under test with high accuracy. The experimental procedure of this proposed sensor is based upon the interaction of the sample food materials with the electromagnetic field owing to shift in resonant frequency as a function of dielectric permittivity of the samples. The proposed antenna sensor has a Q-factor of 409, showing significantly high sensitivity of 280 MHz with 98% accuracy and standard deviation less than the difference between unadulterated and adulterated values, giving resolution high enough to distinguish adulteration with an acceptable statistical accuracy.

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“…are used to determine adulteration of honey. Methods like Fatty Acid Methyl Esters (FAME) [8], Quartz Crystal Microbalance (QCM) [9], nuclear magnetic resonance (NMR) fingerprinting [10], e-noses [11], e-tongue [12], etc. are used to detect adulteration in oils.…”

Section: Introductionmentioning

confidence: 99%

A Novel Liquid Adulteration Sensor Based on a Self Complementary Antenna

Rajendran¹,

Menon²,

Donelli³

2020

PIER C

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In this paper, a novel OLR loaded self complementary dipole antenna (OSCDA) is proposed. Open loop resonators (OLRs) are introduced into the design of a traditional self complementary dipole antenna (SCDA), to evolve it into OSCDA. The antenna is compact and has an impedance bandwidth of 1.1 GHz to 3.3 GHz with VSWR less than 2 across the frequency band. The use of the proposed antenna as a liquid sensor to detect adulteration in liquids is demonstrated from the relationship between concentration and shift in resonant frequency and variation in reflection coefficient. Variation of reflection coefficient due to change in dielectric properties is studied for different cases viz.: (i) dilution of milk with water, (ii) adulteration of coconut oil with rice bran oil, (iii) adulteration of honey with sugar syrup, and (iv) varying concentration of salt and sugar in water. When an adulterant is added to a liquid or concentration of solute in a solution varied, the dielectric properties change. This is reflected in the variation in reflection coefficient and resonant frequency. Experimental results show that the antenna has a good sensitivity to detect adulterated samples.

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Determination of fatty acid methyl esters in cosmetic castor oils by flow injection–electrospray ionization–high‐resolution mass spectrometry

Cited by 8 publications

References 21 publications

Synthesis, Characterization, and Evaluation of Solution Properties of Sesame Fatty Methyl Ester Sulfonate Surfactant

Synthesis, Characterization, and Evaluation of Solution Properties of Sesame Fatty Methyl Ester Sulfonate Surfactant

Exploration of adulteration in common raw spices using antenna-based sensor

A Novel Liquid Adulteration Sensor Based on a Self Complementary Antenna

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