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Results: 21 publication requests found. Partial three-dimensional chromatography of pulse triacylglycerols with triple parallel mass spectrometry We analyzed ten pulses (dried seeds of legumes), baby lima beans, black beans, black-eyed peas, butter beans, cranberry beans, garbanzo beans, green split peas, lentils, navy beans, and pinto beans, using three-dimensional liquid chromatography (3D-LC) with parallel second dimensions, LC × (LC + LC)... Fast Chromatography of Pulse Triacylglycerols A short 10-minute ultra high performance liquid chromatography (UHPLC) method was used for separation and lipidomic analysis of triacylglycerols (TAGs) in ten pulses: baby lima beans, black beans, black-eyed peas, butter beans, cranberry beans, garbanzo beans, green split peas, lentils, navy beans, ... Three-dimensional liquid chromatography with parallel second dimensions and quadruple parallel mass spectrometry for infant formula Three dimensions of chromatographic separation, using split-flow two-dimensional liquid chromatography (SF-2D-LC) with two parallel second dimensions, combined with quadruple parallel mass spectrometry (LC3MS4) is demonstrated for analysis of NIST SRM 1849a adult/infant formula. The first dimension,... Rapid and Sensitive Analytical Assessment of Curcuminoids and Common Turmeric Adulterants using Liquid Chromatography and Tandem Mass Spectrometry Turmeric has gained significant interest among the research community in recent decades because it contains bioactive curcuminoids (curcumin, demethoxycurcumin, and bisdemethoxycurcumin). This increased demand for turmeric has resulted in occasional adulteration, commonly with azo dyes and other che... Two- and three-dimensional chromatography with four dimensions of mass spectrometry, LC2MS4 and LC3MS4: Breaking the rules Two-Dimensional liquid chromatography (2D-LC) is now routinely commercially available and is being implemented in an increasing number of labs around the world. Normally, 2D-LC is done using one or more detectors at the end of the second dimension, 2D, and the first dimension, 1D, is reconstructed f... GC-MS and GC-FID of seven seed oils containing conjugated fatty acids The fatty acid compositions, including isomer compositions, of seven seed oils containing conjugated fatty acids (CFA) were determined. Seed oils were extracted using a modified Folch extraction, converted to fatty acid methyl esters, and analyzed by gas chromatography (GC) with mass spectrometry (M... Changes in Compositions of Galactolipids, Triacylglycerols, and Tocopherols of Lettuce Varieties (Lactuca sativa L.) with Type, Age, and Light Source The effects of light source, age of harvest, and cultivar on the contents of galactolipids (GALs), triacylglycerols (TAGs), diacylglycerols (DAGs), and tocopherols in green and red leaf lettuce varieties (Lactuca sativa L.) were studied using high performance liquid chromatography with triple parall... Timed Relay Contact Closure Controlled System for Parallel Second Dimensions in Multi-Dimensional Liquid Chromatography Two contact closure (CC) activated 4-port, 2-position valves (4P2PVs) for ultra-high performance liquid chromatography (UHPLC) were joined together and used for one of two second dimensions in comprehensive two-dimensional liquid chromatography (2D-LC) coupled to four mass spectrometers simultaneous... Blue jacaranda seed oil analyzed using comprehensive 2D-LC with quadruple parallel MS (LC2MS4) We report 2D-LC in which two mass spectrometers in parallel plus four other detectors (UV, FLD, CAD, and ELSD) are used to monitor the first dimension (1D), while two more mass spectrometers in parallel plus a UV detector are used to monitor the second dimension (2D). LC1MS2 x LC1MS2 = LC2MS4 was em... Analysis of lipids: Triacylglycerols, phospholipids, fatty acids and others Lipids comprise large and disparate classes of molecules having very different overall polarities; but the one characteristic they typically have in common is a non-polar hydrocarbon chain that is hydrophobic in nature. Most definitions of lipids are based on a combination of structural characterist... A Note on the Use of Workstation Software Programs for Quantification Most chromatographic and mass spectrometric instruments include workstations that allow data processing and target compound quantification. However, the software used for quantification does not all use common approaches for statistical treatment of data. Presented here is a brief description of t... The simulacrum system as a construct for mass spectrometry of triacylglycerols and others A construct called a simulacrum is defined that provides all possible solutions to a sum of two mass spectral abundances, based on values (abundances) or ratios of those values. The defined construct is applied to atmospheric pressure chemical ionization (APCI) mass spectrometry (MS) of triacylglyce... Critical ratios for structural analysis of triacylglycerols using mass spectrometry Recent developments have finally allowed fragment behaviors using APCI-MS to be elucidated after twenty years of literature reports. Critical Ratios have been defined that correspond to various aspects of triacylglycerol (TAG) analysis, from overall degree of unsaturation to localization of fatty ac... Extraction and characterization of montmorency (Prunus cerasus L.) sour cherry pit oil Montmorency sour cherry (Prunus cerasus L.) pit oil was extracted and characterized by various methods including: gas chromatography (GC), liquid chromatography coupled with mass spectrometry (LC-MS), nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA), differential scanning calorime... The updated bottom up solution applied to atmospheric pressure photoionization and electrospray ionization mass spectrometry The Updated Bottom Up Solution (UBUS) was recently applied to atmospheric pressure chemical ionization (APCI) mass spectrometry (MS) of triacylglycerols (TAGs). This report demonstrates that the UBUS applies equally well to atmospheric pressure photoionization (APPI) MS and to electrospray ionizatio... Fast comprehensive analysis of vitamin D and triacylglycerols in dietary supplements using multiple parallel mass spectrometers New, faster methods have been developed for analysis of vitamin D and triacylglycerols that eliminate hours of wet chemistry and preparative chromatography, while providing more information than classical methods for analysis. Unprecedented detail is provided by combining liquid chromatography with ... The updated bottom up solution applied to mass spectrometry of soybean oil in a dietary supplement gelcap Among the goals of lipidomics applied to triacylglycerols (TAGs) is identification of molecular species, degree and location of unsaturation, and positions of fatty acyl chains (i.e., identification of regioisomers). Toward those ends, we define one, two, and three ‘Critical Ratios’ for Type I, II, ... Extract-filter-shoot liquid chromatography/mass spectrometry for analysis of vitamin D2 in a powdered supplement capsule and SRM 3280 An ‘extract-filter-shoot’ method for analysis of vitamin D2, ergocalciferol, in a dry powdered dietary supplement capsule containing rice flour excipient and in National Institute of Standards and Technology (NIST) standard reference material (SRM) 3280 is reported. Quantification of vitamin D2 was... Effects of UV-B radiation levels on concentrations of phytosterol, ergothioneine, and polyphenolic compounds in mushroom powder used as dietary supplements Compositional changes of powder dietary supplement made from mushrooms previously exposed to different levels of UV-B irradiation were evaluated for the bioactive naturally occurring mushroom anti-oxidant, ergothioneine, other natural polyphenolic anti-oxidants: e.g. flavonoids, lignans, and others,... Quadruple parallel mass Spectrometry for analysis of vitamin D and triacylglycerols in a dietary supplement A ‘dilute-and-shoot’ method for vitamin D and triacylglycerols is demonstrated that employed four mass spectrometers, operating in different ionization modes, for a ‘quadruple parallel mass spectrometry’ analysis, plus three other detectors, for seven detectors overall. Sets of five samples of diet...