Heuristic evolving latent projections:  resolving two-way multicomponent data.  2.  Detection and resolution of minor constituents

Liang, Yi; Kvalheim, Olav M.; Keller, H.R.; Massart, D.L.; Kiechle, P.; Erni, F.

doi:10.1021/ac00032a020

Cited by 306 publications

(157 citation statements)

References 15 publications

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“…7 -9, respectively. Concerning the different components in peak cluster Y, their pure mass spectra can be acquired by using component stripping technology by HELP [12,21], which are shown in Figs. 10 and 11.…”

Section: Resultsmentioning

confidence: 99%

Comparative analysis of volatile constituents in Citrus Reticulata Blanco using GC–MS and alternative moving window factor analysis

Liu

et al. 2009

J of Separation Science

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The similarities and differences of essential oil components in Album Citri Reticulatae (ACR), Cylindricae Citri Reticulatae (CCR), Folium Citri Reticulatae (FCR), Exocarpium Citri Grandis (ECG), Pericarpium Citri Reticulatae Viride (PCRV) and Pericarpium Citri Reticulatae (PCR) were investigated by GC–MS combined with a chemometric method named alternative moving window factor analysis (AMWFA). And temperature‐programmed retention indices (PTRIs) were used together with mass spectra for identification of the essential oil components. In essential oils of ACR, CCR, FCR, ECG, PCRV and PCR, 28, 26, 61, 62, 52 and 48 components were determined representing 93.13, 94.44, 93.53, 87.67, 99.03 and 98.03% of the total relative content, respectively. Also, the essential oils significantly differed both qualitatively and quantitatively. There were 14 common components among ACR, CCR, FCR, ECG, PCRV and PCR, their abundance varied in the ranges from 32.39% in FCR to 94.66% in PCRV. The results obtained may be helpful to the further study of pharmacological activity for their potential utilization as therapeutical agents.

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Section: Resultsmentioning

confidence: 99%

Comparative analysis of volatile constituents in Citrus Reticulata Blanco using GC–MS and alternative moving window factor analysis

Liu

et al. 2009

J of Separation Science

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“…In fact, there are lots of chemometric methods [203][204][205][206][207][208][209][210][211][212][213][214][215] developed recently to deal with the overlapping chromatographic peaks with the help of the two-way data from hyphenated chromatography. For more detail, the readers can refer to a review paper by one of authors of this review and the references therein [198].…”

Section: On-line Comparison By Chemometric Methodsmentioning

confidence: 99%

Quality control of herbal medicines

Liang¹,

Xie²,

Chan³

2004

Journal of Chromatography B

495

401

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Different chromatographic and electrophoretic techniques commonly used in the instrumental inspection of herbal medicines (HM) are first comprehensively reviewed. Chemical fingerprints obtained by chromatographic and electrophoretic techniques, especially by hyphenated chromatographies, are strongly recommended for the purpose of quality control of herbal medicines, since they might represent appropriately the "chemical integrities" of the herbal medicines and therefore be used for authentication and identification of the herbal products. Based on the conception of phytoequivalence, the chromatographic fingerprints of herbal medicines could be utilized for addressing the problem of quality control of herbal medicines. Several novel chemometric methods for evaluating the fingerprints of herbal products, such as the method based on information theory, similarity estimation, chemical pattern recognition, spectral correlative chromatogram (SCC), multivariate resolution, etc. are discussed in detail with examples, which showed that the combination of chromatographic fingerprints of herbal medicines and the chemometric evaluation might be a powerful tool for quality control of herbal products.

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“…In this case, the chemometric methods are essential to obtain the high-quality mass spectra and retention times. In this method, the overlapping peaks were revolved by the Heuristic Evolving Latent Projections (HELP) [22,23] which was proven to be an effective method to revolve the overlapping peaks [24,25].…”

Section: Identification Of Famesmentioning

confidence: 99%

“…In this case, chemometric methods (such as HELP used in this study) might be useful to obtain the pure mass spectra and chromatographic profiles. For the sake of brevity, only the simple description of HELP is given for the detailed theories and procedures could be found elsewhere [22,23]. The chromatographic peaks in the range of 11.10-11.25 min were taken as example to simply describe how HELP works.…”

Section: Resolution Of Overlapping Peaks By Helpmentioning

confidence: 99%

Establishment of reliable mass spectra and retention indices library: Identification of fatty acids in human plasma without authentic standards

Zhang

Tan

Zeng

et al. 2012

Talanta

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Heuristic evolving latent projections: resolving two-way multicomponent data. 2. Detection and resolution of minor constituents

Cited by 306 publications

References 15 publications

Comparative analysis of volatile constituents in Citrus Reticulata Blanco using GC–MS and alternative moving window factor analysis

Comparative analysis of volatile constituents in Citrus Reticulata Blanco using GC–MS and alternative moving window factor analysis

Quality control of herbal medicines

Establishment of reliable mass spectra and retention indices library: Identification of fatty acids in human plasma without authentic standards

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