Determination of the four major surfactant classes in cleaning products by reversed-phase liquid chromatography using serially connected UV and evaporative light-scattering detection

2016 ◽  
Vol 932 ◽  
pp. 106-113 ◽  
Author(s):  
Aarón Escrig-Doménech ◽  
Ernesto F. Simó-Alfonso ◽  
Guillermo Ramis-Ramos
Keyword(s):  
Liquid Chromatography ◽  
Light Scattering ◽  
Reversed Phase ◽  
Evaporative Light Scattering Detection ◽  
Reversed Phase Liquid Chromatography ◽  
Light Scattering Detection ◽  
Cleaning Products ◽  
Evaporative Light Scattering ◽  
Phase Liquid

scholarly journals Determination of Ginsenosides in Panax ginseng Roots by Liquid Chromatography with Evaporative Light-Scattering Detection

2000 ◽  
Vol 83 (4) ◽  
pp. 820-829 ◽  
Author(s):  
Nicola Fuzzati ◽  
Bruno Gabetta ◽  
Kaishik Jayakar ◽  
Roberto Pace ◽  
Giuseppe Ramaschi ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Light Scattering ◽  
Panax Ginseng ◽  
Reversed Phase ◽  
Evaporative Light Scattering Detection ◽  
Intermediate Precision ◽  
Light Scattering Detection ◽  
Evaporative Light Scattering ◽  
Liquid Chromatographic

Abstract A liquid chromatographic method was developed and validated for the determination of ginsenosides in Panax ginseng roots by using evaporative light-scattering detection. Eighteen ginsenosides were separated on a reversed-phase C18 column with water–ammonium acetate–acetonitrile as the mobile phase. The method is suitable for the routine determination of ginsenosides in P. ginseng roots and extracts. The validation of the method was comprehensive for efficiency and recovery optimization of the P. ginseng roots extraction, specificity by liquid chromatography/mass spectrometry, linearity, stability, reproducibility, repeatability, intermediate precision, and robustness.

scholarly journals Sample Preparation and Determination of Ginkgo Terpene Trilactones in Selected Beverage, Snack, and Dietary Supplement Products by Liquid Chromatography with Evaporative Light-Scattering Detection

2004 ◽  
Vol 87 (4) ◽  
pp. 815-826 ◽  
Author(s):  
Qingyong Lang ◽  
Chien M Wai ◽  
Catharina Y W Ang ◽  
Yanyan Cui ◽  
Thomas M Heinze ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Light Scattering ◽  
Sample Preparation ◽  
Reversed Phase ◽  
Evaporative Light Scattering Detection ◽  
Light Scattering Detection ◽  
Evaporative Light Scattering ◽  
Relative Standard ◽  
Terpene Trilactones

Abstract Ginkgo biloba leaf extract has been widely used in dietary supplements and more recently in some foods and beverages. Sample preparation procedures for determination of ginkgo terpene trilactones (including bilobalide and ginkgolides A, B, C, and J) in various sample matrixes were developed in this study. Ginkgo leaves and capsules were extracted with 5% KH2PO4 aqueous solution under sonication. Tea bags were extracted with boiling water, whereas drink samples were taken directly from the bottles. After filtration and the addition of NaCl to approximately 30% (w/v), the terpene trilactones in aqueous solutions were quantitatively extracted with ethyl acetate–tetrahydrofuran (4 + 1, v/v). Puff samples (a cereal-based fried snack item) were first defatted by using hexane or by using supercritical fluid extraction and then extracting under sonication with methanol–acetic acid (99 + 1, v/v). After evaporation of the organic phase, the terpene trilactones were redissolved in methanol and determined on a C18 reversed-phase column by liquid chromatography (LC) with evaporative light-scattering detection. The method of standard additions and gas chromatography with flame ionization detection were used for method validation. For most samples, the relative standard deviation was <10%. The identities of target compounds in ginkgo leaves and drink samples were confirmed by LC/electrospray ionization–tandem mass spectrometry.

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