Differentiation of Maturity and Quality of Fruit Using Noninvasive Extractive Electrospray Ionization Quadrupole Time-of-Flight Mass Spectrometry

Chen, Huanwen; Sun, Yanping; Wortmann, Arno; Gu, Haiwei; Zenobi, Renato

doi:10.1021/ac061843x

Cited by 103 publications

(93 citation statements)

References 55 publications

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“…In this case, liquid droplets representing the molecular composition of the bulk sample are transported by a stream of nitrogen gas into the EESI source [5,65,66,68,71,75,78,79], followed by ionization and detection. As a result, liquids with complex chemical compositions and high viscosities (e.g., serum, honey, edible oils, crude oils, ionic liquids, toothpaste, etc.)…”

Section: Samples Accessible For Analysis By Ambient Ionization Technimentioning

confidence: 99%

What can we learn from ambient ionization techniques?

Chen

Gamez

Zenobi

2009

J. Am. Soc. Mass Spectrom.

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228

178

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Ambient mass spectrometry-mass spectrometric analysis with no or minimal effort for sample preparation-has experienced a very rapid development during the last 5 years, with many different methods now available for ionization. Here, we review its range of applications, the hurdles encountered for its quantitative use, and the proposed mechanisms for ion formation. Clearly, more effort needs to be put into investigation of matrix effects, into defining representative sampling of heterogeneous materials, and into understanding and controlling the underlying ionization mechanisms. Finally, we propose a concept to reduce the number of different acronyms describing very similar embodiments of ambient mass spectrometry. (J Am Soc Mass

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Section: Samples Accessible For Analysis By Ambient Ionization Technimentioning

confidence: 99%

What can we learn from ambient ionization techniques?

Chen

Gamez

Zenobi

2009

J. Am. Soc. Mass Spectrom.

Self Cite

228

178

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“…Another technology, namely extractive electro-spray ionization coupled with quadruple time-of-flight MS was developed to monitor fruit maturity and provide different spectral fingerprints for fruit of different maturities (Chen et al 2007). The data collected from this study were also confirmed using principal component analysis.…”

Section: Analysis Of Flavour and Aroma Volatilesmentioning

confidence: 99%

Flavour volatile production and regulation in fruit

Song¹,

Forney²

2008

Can. J. Plant Sci.

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fruit as examples, this review focuses on recent developments in fruit aroma research. Both sensory studies and instrumental analysis confirm the importance of volatile production in fruit and its contribution to eating quality. Sensory analysis should further define the contribution of individual volatile compounds to total flavour quality. Volatile biosynthesis and its contribution to fruit eating quality is very complex, and is influenced by many factors, such as genome, harvest maturity, and postharvest handling and storage. Application of 1-methylcyclopropene (1-MCP) and transgenic lines suppressing ethylene action and biosynthesis demonstrate ethylene involvement in volatile formation and provide useful research tools to elucidate the volatile production process during fruit ripening. Cloning of genes and characterization of enzymes responsible for volatile production helps us to understand the biochemical pathways and control mechanisms. Despite the exciting developments in flavour research, several challenges still remain to be solved. An understanding of the fundamental mechanisms controlling changes in flavour quality is limited, and most biochemical pathways determining this quality trait are still unknown. As part of secondary metabolism, volatile production in fruit is a complex process with tightly controlled systems involving substrates, enzymes and energy from many pathways. It is our hope that the biochemical pathways regulating the synthesis of volatile compounds in fruit will be determined using integrated approaches, including biochemical, genomic, proteomic and microscopy tools to determine fundamental metabolism and its localization. Combining these efforts with direct measurement of sensory properties will lead us to new methods to optimize and retain fruit flavour in the market place.Key words: aroma, fruit ripening, volatile analysis, sensory, apple, strawberry, muskmelon Song, J. et Forney, C. F. 2008. Production et re´gulation de la saveur chez le fruit. Can. J. Plant Sci. 88: 537Á550. On mange de plus en plus de fruits frais, les consommateurs e´tant conscients de leur valeur nutritive et de leur roˆle dans la pre´vention de la maladie. Rehausser la saveur des fruits frais offerts au consommateur en accroıˆtrait la valeur, augmenterait leur consommation et engendrerait de nouveaux de´bouche´s. Une des principales caracte´ristiques associe´es au muˆrissement des fruits est la production d'aroˆmes. Prenant la pomme (Malus domestica), la fraise (Fragaria ananassa Duch.) et le melon brode( Cucumis melo L. var. reticulatus Naud; C. melo L. inodorus; C. melo L. cantalupensis) comme exemples, les auteurs passent en revue les progre`s re´cents re´alise´s dans la recherche sur l'aroˆme des fruits. Les e´tudes organoleptiques et les analyses instrumentales confirment l'importance de la production d'aroˆmes par le fruit et l'apport de ces derniers a`la qualite´gustative. Une analyse organoleptique devrait mieux pre´ciser la contribution des divers compose´s volatils a`la qualite´ge´ne´rale de la...

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“…Although matrix-assisted laser desorption ionization provides considerably better ionization efficiency than that of simple LDI [16], this can still be enhanced by electrospray post-ionization [17,18]. Another similar method is extractive electrospray ionization (EESI), which is also applied both for the ESI-MS analysis of fluid samples [19,20] and for the post-ionization of neutrals desorbed from solid surfaces [21,22].…”

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confidence: 99%

Electrospray Post-Ionization Mass Spectrometry of Electrosurgical Aerosols

Guenther

Schäfer

Balog³

et al. 2011

J. Am. Soc. Mass Spectrom.

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The feasibility of electrospray (ES) ionization of aerosols generated by electrosurgical disintegration methods was investigated. Although electrosurgery itself was demonstrated to produce gaseous ions, post-ionization methods were implemented to enhance the ion yield, especially in those cases when the ion current produced by the applied electrosurgical method is not sufficient for MS analysis. Post-ionization was implemented by mounting an ES emitter onto a Venturi pump, which is used for ion transfer. The effect of various parameters including geometry, high voltage setting, flow parameters, and solvent composition was investigated in detail. Experimental setups were optimized accordingly. ES post-ionization was found to yield spectra similar to those obtained by the REIMS technique, featuring predominantly lipid-type species. Signal enhancement was 20-to 50-fold compared with electrosurgical disintegration in positive mode, while no improvement was observed in negative mode. ES post-ionization was also demonstrated to allow the detection of non-lipid type species in the electrosurgical aerosol, including drug molecules. Since the tissue specificity of the MS data was preserved in the ES post-ionization setup, feasibility of tissue identification was demonstrated using different electrosurgical methods.

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Differentiation of Maturity and Quality of Fruit Using Noninvasive Extractive Electrospray Ionization Quadrupole Time-of-Flight Mass Spectrometry

Cited by 103 publications

References 55 publications

What can we learn from ambient ionization techniques?

What can we learn from ambient ionization techniques?

Flavour volatile production and regulation in fruit

Electrospray Post-Ionization Mass Spectrometry of Electrosurgical Aerosols

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