Quantitative analysis of cyclic dimer fatty acid content in the dimerization product by proton NMR spectroscopy

Park, Kyun Joo; Kim, Minyoung; Seok, Seunghwan; Kim, Young‐Wun; Kim, Do Hyun

doi:10.1016/j.saa.2015.04.099

Cited by 13 publications

(14 citation statements)

References 34 publications

(60 reference statements)

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“…However, due to the disadvantages of chromatography, GC-MS and LC-MS have many limitations for the analysis of unknown samples and new types of drugs. Additionally, advance information about the sample and time-consuming pretreatment is required [ 6 ]. As new drugs constantly appear, the components of illegal drugs become more complicated.…”

Section: Introductionmentioning

confidence: 99%

The Application of a Desktop NMR Spectrometer in Drug Analysis

Zhong

Huang

Luo

et al. 2018

International Journal of Analytical Chemistry

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A desktop NMR spectrometer was used to qualitatively analyze samples in drug-related cases in order to enhance the accuracy of the results and identify new drugs. Twelve known drugs and their derivatives were used to establish the parameters, conditions, and procedures for the methods and validate the feasibility and reliability of the methods. First, 1-D and 2-D NMR data for these 12 drugs and their derivatives were obtained in detail using a 600-MHz NMR spectrometer to create a data library. Next, some of these 12 drugs were analyzed using a Picospin 80 MHz desktop NMR spectrometer to set up the analytical procedure and method. With the procedure and method established, real case samples were analyzed and the data were compared to those obtained by a standard method. The results indicate that the desktop NMR spectrometer is a reliable and promising approach that can be used in criminology to quickly identify whether or not samples contain illegal drugs.

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Section: Introductionmentioning

confidence: 99%

The Application of a Desktop NMR Spectrometer in Drug Analysis

Zhong

Huang

Luo

et al. 2018

International Journal of Analytical Chemistry

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“…2a and b, respectively, as the acyclic isomer is the most abundant among the three isomers. 36 The distinct resonance observed for the carboxyl group of DFA (signal h at 11.88 ppm) disappears in Fig. 2b, while resonance for hydroxyl group of DEA clearly observed (signal k at 4.04 ppm).…”

Section: Characterizations Of Pgsmentioning

confidence: 87%

Polyhydroxy gemini surfactant as a mechano-responsive rheology modifier for inverted emulsion drilling fluid

Jiang

Deng

et al. 2018

RSC Adv.

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“…In this work, DA was chosen as the model compound, and it was synthesized according to the previous reports [19,20]. First, the fatty acids were obtained via the hydrolysis of soybean oil.…”

Section: Methodsmentioning

confidence: 99%

Role of the Oxethyl Unit in the Structure of Vegetable Oil-Based Plasticizer for PVC: An Efficient Strategy to Enhance Compatibility and Plasticization

Tan

Liu

et al. 2019

Polymers

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Developing vegetable oil-derived primary plasticizers for poly(vinyl chloride) (PVC) is still a challenge because of their insufficient compatibility. As described in this work, we report the synthesis of plasticizers through the esterification of polyethylene glycol methyl ether and dimer acid, in which dimer acid is renewable material prepared via a two-step reaction (1) the hydrolysis of fatty acids from soybean oil at 70 °C and (2) subsequent Diels–Alder reaction at 250 °C. The resulting plasticizers, dimer acid-derived polyethylene glycol methyl ether esters (DA-2n, 2n = 2, 4, 6 or 8 referring to the number of oxethyl units per molecule), were blended with PVC. It was found that the tensile properties, transparency, and thermal stability of plasticized PVC (PVC-DA-2n) increased significantly with an increase in the number of oxyethyl units. Fourier-transform infrared spectroscopy analysis revealed that its good compatibility can be attributed to the strong interaction between oxyethyl units and PVC. As the number of the oxyethyl units of plasticizer increased, the glass transition temperature (Tg) of the corresponding plasticized PVC samples decreased from 62.3 (PVC-DA-2) to 35.4 °C (PVC-DA-8). Owing to the excellent plasticization of DA-8, the performances of PVC-DA-8 were comparable or better than that of the PVC plasticized using commercial dioctyl terephthalate (DOTP). The simple but efficient method of this study provides a new avenue for the preparation of vegetable oil-based plasticizers for PVC.

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Quantitative analysis of cyclic dimer fatty acid content in the dimerization product by proton NMR spectroscopy

Cited by 13 publications

References 34 publications

The Application of a Desktop NMR Spectrometer in Drug Analysis

The Application of a Desktop NMR Spectrometer in Drug Analysis

Polyhydroxy gemini surfactant as a mechano-responsive rheology modifier for inverted emulsion drilling fluid

Role of the Oxethyl Unit in the Structure of Vegetable Oil-Based Plasticizer for PVC: An Efficient Strategy to Enhance Compatibility and Plasticization

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