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37 Newest Publications about the topic reference substances

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Molecules, Vol. 23, Pages 1504: Rapid Detection of Six Glucocorticoids Added Illegally to Dietary Supplements by Combining TLC with Spot-Concentrated Raman Scattering

21-Jun-2018 | Li, Li ; Liang, Xin ; Xu, Tao ; Xu, Feng ; Dong, Wei, Molecules, 2018

Molecules, Vol. 23, Pages 1504: Rapid Detection of Six Glucocorticoids Added Illegally to Dietary Supplements by Combining TLC with Spot-Concentrated Raman Scattering Molecules doi: 10.3390/molecules23071504 Authors: Li Li Xin Liang Tao Xu Feng Xu Wei Dong The objective of ...

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Liquid Chromatographic Method for the Determination of Caffeoylquinic Acid Derivates in Hieracium pilosella L

03-Jul-2017 | Larisa Borisova‐Jan, Dick Fransson, Per Claeson, Robert Burman, Phytochemical Analysis, 2017

Abstract Introduction Hieracium pilosella L. is a medicinal plant encountered in Europe in traditional herbal medicinal products. Caffeoylquinic (ortho‐dihydroxycinnamic) acid derivatives are characteristic constituents used as analytical markers in the quality control of the herbal ...

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Liquid Chromatographic Method for the Determination of Caffeoylquinic Acid Derivates in Hieracium pilosella L

03-Jul-2017 | Larisa Borisova‐Jan, Dick Fransson, Per Claeson, Robert Burman, Phytochemical Analysis, 2017

Abstract Introduction Hieracium pilosella L. is a medicinal plant encountered in Europe in traditional herbal medicinal products. Caffeoylquinic (ortho‐dihydroxycinnamic) acid derivatives are characteristic constituents used as analytical markers in the quality control of the herbal ...

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Comparison of the chemical profiles of fresh‐raw and dry‐processed Juglans mandshurica

23-Nov-2016 | Jinhai Huo, Xiaowei Du, Guodong Sun, Yanli Meng, Weiming Wang, Journal of Separation Science, 2016

Abstract The processing of Juglans mandshurica maxim. is important to reduce its toxicity and enhance its efficacy. Simple, efficient, and sensitive ultra high performance liquid chromatography coupled with a time‐of‐flight mass spectrometry‐based chemical profiling approach was proposed to ...

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Electron microscopic investigation and elemental analysis of titanium dioxide in sun lotion

18-Oct-2016 | Marina Sysoltseva, Richard Winterhalter, Angela S. Wochnik, Christina Scheu, Hermann Fromme, International Journal of Cosmetic Science, 2016

Abstract Objective The objective of this research was to determine the size, shape and aggregation of titanium dioxide (TiO2) particles which are used in sun lotion as UV‐blocker. Methods Overall, six sunscreens from various suppliers and two reference substances were analysed by ...

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Direct Coupling of HPTLC with MALDI‐TOF MS for Qualitative Detection of Flavonoids on Phytochemical Fingerprints

17-Jun-2016 | Ivana Kroslakova, Simona Pedrussio, Evelyn Wolfram, Phytochemical Analysis, 2016

Abstract Introduction Thin layer chromatographic fingerprints of plant raw materials and extracts for food and pharma applications often focus on phenol carbonic acids and flavonoids. The visual detection and comparison of Rf values of applied reference substances only renders limited ...

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Molecules, Vol. 21, Pages 640: Simultaneous Qualitative and Quantitative Analysis of Multiple Chemical Constituents in YiQiFuMai Injection by Ultra-Fast Liquid Chromatography Coupled with Ion Trap Time-of-Flight Mass Spectrometry

18-May-2016 | Liu, Chunhua ; Ju, Aichun ; Zhou, Dazheng ; Li, Dekun ; Kou, Junping ; Yu, Boyang ; Qi, Jin, Molecules, 2016

YiQiFuMai injection (YQFM) is a modern lyophilized powder preparation derived from the traditional Chinese medicine Sheng-mai san (SMS) used for treating cardiovascular diseases, such as chronic heart failure. However, its chemical composition has not been fully elucidated, particularly for the ...

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Simultaneous qualitative and quantitative analysis of flavonoids and alkaloids from the leaves of Nelumbo nucifera Gaertn. using high‐performance liquid chromatography with quadrupole time‐of‐flight mass spectrometry

10-May-2016 | Yujie Guo, Xi Chen, Jin Qi, Boyang Yu, Journal of Separation Science, 2016

A reliable method, combining qualitative analysis by high‐performanceliquid chromatography coupled with quadrupole time‐of‐flight mass spectrometry and quantitative assessment by high‐performanceliquid chromatography photodiode array detector, has been developed to simultaneously analyze ...

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Nondestructive Molecular Characterization of Polycarbonate–Polyvinylamine Composites after Thermally Induced Aminolysis

21-Apr-2016 | Cordelia Zimmerer, Jürgen Nagel, Gerald Steiner, Gert Heinrich, Macromolecular Materials and Engineering, 2016

Thermal induced solid phase polymer reactions between bisphenol‐A‐based polycarbonate (PC) and polyvinylamine (PVAm) are used to form permanent composite material. The PC–PVAm interface is characterized by infrared (IR) spectroscopy. IR spectra of synthesized reference substances which can be ...

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Analysis of lignans in Magnoliae Flos by turbulent flow chromatography with online solid‐phase extraction and high‐performance liquid chromatography with tandem mass spectrometry

02-Feb-2016 | Xuan Zhou, Cen Chen, Xiaolan Ye, Fenyun Song, Guorong Fan, Fuhai Wu, Journal of Separation Science, 2016

In this study, a method coupling turbulent flow chromatography with online solid‐phase extraction and high‐performance liquid chromatography with tandem mass spectrometry was developed for analyzing the lignans in Magnoliae Flos. By the online pretreatment of turbulent flow chromatography ...

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