Saponification of peony seed oil using response surface methodology

Zan, Mingyang; Wang, Xue; Amuti, Aibibai; Wang, Zhanzhong; Dang, Leping

doi:10.1016/j.indcrop.2021.114134

Cited by 8 publications

(3 citation statements)

References 32 publications

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“…Hydroperoxide concentrations increased with time, reaching a maximum of 30.44 mmol·kg -1 at 2 h. A large amount of peroxide is formed when levopimaric acid is oxidized [ 37 ]. Figure 4 shows the peroxide value-temperature relationship at 2 h. As the temperature increased from 313 to 323 K, the peroxide value increased, indicating the accumulation of peroxides [ 38 ]. As the temperature was increased from 323 to 353 K, the value of peroxide decreased significantly.…”

Section: Resultsmentioning

confidence: 99%

Thermal stability of levopimaric acid and its oxidation products

Li,

Chen,

Yan

et al. 2023

BMC Chemistry

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Biofuels are renewable alternatives to fossil fuels. Levopimaric acid‒base biofuels have attracted increasing attention. However, their stability remains a critical issue in practice. Thus, there is a strong impetus to evaluate the thermal stability of levopimaric acid. Through thermogravimetry (TG) and a custom-designed mini closed pressure vessel test (MCPVT) operating under isothermal and stepped temperature conditions, we investigated thermal oxidation characteristics of levopimaric acid under oxygen atmosphere. Thin-layer chromatography (TLC) and iodimetry were used to measure the hydrogen peroxides generated by levopimaric acid oxidation. A high pressure differential scanning calorimeter (HPDSC) was used to assess hydroperoxide thermal decomposition characteristics. Gas chromatography-mass spectrometry (GC-MS) was used to characterize the oxidation products. The thermal decomposition kinetics of levopimaric acid were thus elucidated, and a high peroxide value was detected in the levopimaric acid. The decomposition heat (QDSC) and exothermic onset temperature (Tonset) of hydroperoxides were 338.75 J g−1 and 375.37 K, respectively. Finally, levopimaric acid underwent a second-stage oxidation process at its melt point (423.15 K), resulting in complex oxidation products. Thermal oxidation of levopimaric acid could yield potential thermal hazards, indicating that antioxidants must be added during levopimaric acid application to protect against such hazardous effects.

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Section: Resultsmentioning

confidence: 99%

Thermal stability of levopimaric acid and its oxidation products

Li,

Chen,

Yan

et al. 2023

BMC Chemistry

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“…The saponification reaction was performed according to the method reported by Zan et al. (2021). Solid NaOH was dissolved in 95% ethanol by long stirring and ultrasonic‐assisted dissolution, and ATSO (50 g) was added 200 – 300 ml of a solution of NaOH and ethanol (95%, v/v).…”

Section: Methodsmentioning

confidence: 99%

“…In the saponification reaction process, NaOH is actually involved in the reaction, while ethanol is present as a solvent. In order to avoid ambiguity in studying the influence of the alcohol‐oil ratio on the reaction, we chose the dosage of NaOH to replace the concentration of NaOH in the single‐factor experiments (Zan et al., 2021). Only one factor was changed within the specified range in each experiment in order to determine significant influence factors based on fatty acid yields for further RSM analysis.…”

Section: Methodsmentioning

confidence: 99%

Optimization technology and kinetic studies of Acer truncatum seed oil saponification and crystallization separation of nervonic acid

Fan

Zan

et al. 2022

Journal of Food Science

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Acer truncatum seed oil (ATSO) contains abundant unsaturated fatty acids, with significant quantities of nervonic acid (NA, > 5%), which was authenticated as a new food resource in China. For the sake of minimizing animal consumption and the importance of NA for human health, extraction of NA from plants has become a research hotspot. In the present study, three extraction factors were determined to significantly influence the saponification reaction based on single‐factor experiments: NaOH dosage, reaction time, and reaction temperature. These three factors were used to further optimize the saponification process through the response surface methodology, and the highest yield of mixed fatty acids was 83.12%. Moreover, the activation energy (40.8228 kJ/mol), the pre‐exponential factor [2.568 × 106 m3/(kmol·min)], and the kinetic equation [rA = kcAcB = 2.568 × 106·exp(–4970.1T)$\frac{{{\rm{4970}}{\rm{.1}}}}{{\rm{T}}})$cAcB] of the ATSO saponification reaction were determined by combining the chemical reaction rate equation of the elementary reaction, the Arrhenius equation, and the NaOH concentration in the substrate. Finally, the mixed fatty acids of ATSO were crystallized by triple‐stage low‐temperature crystallization, and we achieved 25.05% purity for NA. This study provides a technological basis and strategy for specific fatty acid production from ASTO, as well as other vegetable oils important in the field of food and health supplement products. Practical Application Nervonic acid (NA) is an essential component of neural cells and neural tissue, and it is vital for maintaining the normal work of nerve tissues in organisms and promotes neurodevelopment. NA has traditionally been mainly obtained from shark hunting, which is now restricted due to an international ban on shark fishing. The alternative way to produce NA cheaply and in large quantities is from plant sources. The techniques utilized in this study provide an effective method of NA separation from Acer truncatum seed oil for industrial production.

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