Rapid determination of anhydride content in trans -polyisoprene- graft -maleic anhydride by double-shot pyrolysis gas chromatography–mass spectrometry

Takeno, Kanokwan Jumtee; Takeno, Shinya; Isao, Yuki; Yamaguchi, Shûhei; Suzuki, Nobuaki; Nakazawa, Yasuhiro

doi:10.1016/j.jaap.2015.10.006

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…Gas chromatography-mass spectrometry (GC-MS) is widely used for metabolites analysis [20,21]. Pyrolysis together with GC-MS (Py-GC-MS) has been used for the structure analysis of complex organic compounds, especially for polymers [22][23][24]. Py-GC-MS was also used for the separation, identification and quantification of NR [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Characterization of natural rubber concerning its components and molecular weight in Taraxacum kok‐saghyz Rodin using pyrolysis gas chromatography‐mass spectrometry

Wang,

Fan,

et al. 2023

J of Separation Science

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Taraxacum kok‐saghyz Rodin (TKS) has abundant natural rubber in its root and the molecular weight of its natural rubber is higher than that in Hevea brasiliensis. Thus, TKS is an excellent alternative for the commercial production of natural rubber. The content and molecular weight of natural rubber are two qualitative indicators. Efficient determination for both indicators is still a challenge. In this study, we developed a method to simultaneously determine the content and molecular weight of natural rubber in TKS with pyrolysis－gas chromatography‐mass spectrometry. The content of natural rubber was quantified by internal standard method. We optimized the pyrolysis temperature and chromatographic method during content determination. The limits of detection and quantification were 0.47 and 1.56 μg, respectively. In addition, the arachidonic acid methyl ester, an unsaturated fatty acid proposed from the α‐end group of natural rubber, was quantified to obtain the number of natural rubber polymers. Based on the content and the polymer number, we also quantified the molecular weight of natural rubber. Thus, the content and molecular weight of natural rubber were simultaneously determined in TKS. Our study provides a new perspective for the high throughput analysis of natural rubber.

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Section: Introductionmentioning

confidence: 99%

Characterization of natural rubber concerning its components and molecular weight in Taraxacum kok‐saghyz Rodin using pyrolysis gas chromatography‐mass spectrometry

Wang,

Fan,

et al. 2023

J of Separation Science

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“…There are also some instrumental analysis methods that can be used to quantify anhydride groups, which mainly include GC , NMR spectroscopy , and FTIR spectroscopy . The GC method is very suitable to be used to analyze the volatile compounds (i.e.…”

Section: Introductionmentioning

confidence: 99%

Quantification of anhydride groups in anhydride‐based epoxy hardeners by reaction headspace gas chromatography

Xie

Gong

Yu³

2017

J of Separation Science

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We demonstrate a reaction headspace gas chromatographic method for quantifying anhydride groups in anhydride-based epoxy hardeners. In this method, the conversion process of anhydride groups can be realized by two steps. In the first step, anhydride groups in anhydride-based epoxy hardeners completely reacted with water to form carboxyl groups. In the second step, the carboxyl groups reacted with sodium bicarbonate solution in a closed sample vial. After the complete reaction between the carboxyl groups and sodium bicarbonate, the CO formed from this reaction was then measured by headspace gas chromatography. The data showed that the reaction in the closed headspace vial can be completed in 15 min at 55°C, the relative standard deviation of the reaction headspace gas chromatography method in the precision test was less than 3.94%, the relative differences between the new method and a reference method were no more than 9.38%. The present reaction method is automated, efficient and can be a reliable tool for quantifying the anhydride groups in anhydride-based epoxy hardeners and related research.

show abstract

Rapid determination of anhydride content in trans -polyisoprene- graft -maleic anhydride by double-shot pyrolysis gas chromatography–mass spectrometry

Cited by 2 publications

References 29 publications

Characterization of natural rubber concerning its components and molecular weight in Taraxacum kok‐saghyz Rodin using pyrolysis gas chromatography‐mass spectrometry

Characterization of natural rubber concerning its components and molecular weight in Taraxacum kok‐saghyz Rodin using pyrolysis gas chromatography‐mass spectrometry

Quantification of anhydride groups in anhydride‐based epoxy hardeners by reaction headspace gas chromatography

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