Determination of volatile organic compounds in pen inks by a dynamic headspace needle trap device combined with gas chromatography–mass spectrometry

Zang, Xiaohuan; Liang, Weiqian; Chang, Qingyun; Wu, Tong; Wang, Chun

doi:10.1016/j.chroma.2017.07.030

Cited by 31 publications

(9 citation statements)

References 30 publications

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“…This is mainly because high extraction temperatures improve the kinetic of mass transfer from the bulk sample to the headspace, favouring the efficiency of the extraction procedure [10,23,25]. However, too high temperatures may cause the thermal degradation of the most labile VOCs and decrease the trapping capability of the sorbent, due to the exothermic effect of the sorption process [25,29]. In this work, the best results were obtained using 50 ºC as extraction temperature (Fig.…”

Section: Extraction Temperaturementioning

confidence: 80%

A comprehensive methodology based on NTME/GC-MS data and chemometric tools for lemons discrimination according to geographical origin

Figueira

Porto-Figueira

Câmara

2020

Microchemical Journal

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Section: Extraction Temperaturementioning

confidence: 80%

A comprehensive methodology based on NTME/GC-MS data and chemometric tools for lemons discrimination according to geographical origin

Figueira

Porto-Figueira

Câmara

2020

Microchemical Journal

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“…A dynamic headspace application, based on the immobilization of ZIF‐8‐NPC on a needle‐trap device was described for the extraction of harmful volatile organic compounds from pen inks prior to GC‐MS detection [58]. After the carbonization of ZIF‐8, the raw ZIF‐8‐NPC was treated with HCl aqueous solution to remove ZnO produced in the carbonization, and concomitantly increasing the porosity of the NPC.…”

Section: Fibersmentioning

confidence: 99%

Zeolitic imidazolate frameworks in analytical sample preparation

Rodas

Fikarová

Pasanen

et al. 2021

J of Separation Science

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Zeolitic imidazolate frameworks are a class of metal-organic frameworks that are topologically isomorphic with zeolites. Zeolitic imidazolate frameworks are composed of tetrahedrally coordinated metal ions connected by imidazolate linkers and have a high porosity and chemical stability. Here, we summarize the progress made in the application of zeolitic imidazolate frameworks in sample preparation for analytical purposes. This review is focused on analytical methods based on liquid chromatography, gas chromatography, or capillary electrophoresis, where the use of zeolitic imidazolate frameworks has contributed to increasing the sensitivity and selectivity of the method. While bulk zeolitic imidazolate frameworks have been directly used in analytical sample preparation protocols, a variety of strategies for their magnetization or their incorporation into sorbent particles, monoliths, fibers, stir bars, or thin films, have been developed. These modifications have facilitated the handling and application of zeolitic imidazolate frameworks for a number of analytical sample treatments including magnetic solid-phase extraction, solid-phase microextraction, stir bar sorptive extraction, or thin film microextraction, among other techniques.

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“…Moreover, a specific packing material or a combination of several packing materials coating the inside of the extraction needle endows the NTD with superb sampling selectivity and enables it to adsorb the target volatile compounds and reduce the matrix effects [22]. In recent years, NTD was successfully applied to analyse volatile organic components in the chemical industry, food science and environmental monitoring fields [23][24][25]; however, it has been seldom employed in the study of TCM processing.…”

Section: Introductionmentioning

confidence: 99%

Discrimination of volatiles in herbal formula Baizhu Shaoyao San before and after processing using needle trap device with multivariate data analysis

Cai

Cao

et al. 2018

R. Soc. open sci.

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To characterize the chemical differences of volatile components between crude and processed Baizhu Shaoyao San (BSS), a classical Chinese herbal formula that is widely applied in the treatment of gastrointestinal diseases, we developed a gas chromatography–mass spectrometry-based needle trap device combined with multivariate data analysis to globally profile volatile components and rapidly identify differentiating chemical markers. Using a triple-bed needle packed with Carbopack X, DVB and Carboxen 1000 sorbents, we identified 121 and 123 compounds, respectively, in crude and processed BSS. According to the results of principal component analysis and orthogonal partial least-squares discriminant analysis, crude and processed BSS were successfully distinguished into two groups with good fitting and predicting parameters. Furthermore, 21 compounds were identified and adopted as potential markers that could be employed to quickly differentiate these two types of samples using S-PLOT and variable importance in projection analyses. The established method can be applied to explain the chemical transformation of Chinese medicine processing in BSS and further control the quality and understand the processing mechanism of Chinese herbal formulae. Besides, the triple-bed needle selected and optimized in this study can provide a valuable reference for other plant researches with similar components. Furthermore, the systematic research on compound identification and marker discrimination of the complex components in crude and processed BSS could work as an example for other similar studies, such as composition changes in one plant during different growth periods, botanical characters of different medicinal parts in same kind of medicinal herbs and quality identification of one species of medicinal herb from different regions.

show abstract

Determination of volatile organic compounds in pen inks by a dynamic headspace needle trap device combined with gas chromatography–mass spectrometry

Cited by 31 publications

References 30 publications

A comprehensive methodology based on NTME/GC-MS data and chemometric tools for lemons discrimination according to geographical origin

A comprehensive methodology based on NTME/GC-MS data and chemometric tools for lemons discrimination according to geographical origin

Zeolitic imidazolate frameworks in analytical sample preparation

Discrimination of volatiles in herbal formula Baizhu Shaoyao San before and after processing using needle trap device with multivariate data analysis

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