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The Role of Selectivity in Liquid Chromatography Method Development (PDF 1332kB)

... compounds. The resolution of one analyte from another in a chromatographic separation is determined analyte and, assuming adequate retention and good efficiency are maintained, chromatographic resolution...

USLC Columns: Choose Columns Fast. Develop Methods Faster. (PDF 1815kB)

... of orthogonal selectivity—the most influential factor affecting peak separation, or resolution—to provide the practicing chromatographer with the best tools for choosing columns fast and developing methods faster ... column selectivity, peak separation, stationary phase, chromatographic resolution...

USLC Columns Put the Right Tools in Your LC Method Development Toolbox (PDF 1474kB)

... Chromatography Products The most significant influence on chromatographic peak separation, or resolution the impact of column selectivity on peak separation, or resolution, we can see why choosing the right ... column selectivity, peak separation, stationary phase, chromatographic resolution, USLC...

Simplified Methylmalonic Acid Analysis without Derivatization in Human Plasma by LC-MS/MS (PDF 584kB)

..., chromatographic resolution can be difficult to achieve between methylmalonic acid and its naturally occurring straightforward. In addition, the 5-minute total chromatographic analysis time makes this method suitable...

Featured Application: Methylmalonic Acid (MMA) on Force C18 Simplified Methylmalonic Acid Analysis without Derivatization in Human Plasma by LC-MS/MS

... evaporation, and/or SPE. Additionally, chromatographic resolution can be difficult to achieve between chromatographic analysis time makes this method suitable as a high-throughput assay for the clinical diagnosis ... complete chromatographic resolution of isobaric analytes from the direct injection of a protein crash...

Evaluation of a Simple Method for Methylmalonic Acid Analysis in Human Plasma by LC-MS/MS (PDF 735kB)

...) analysis was developed that provides complete chromatographic resolution from isobaric succinic acid evaporation, and/or SPE. Additionally, chromatographic resolution can be difficult to achieve between MMA...

Will Pro EZGC Chromatography Modeling Software Work For You? We Put It to the Test! (PDF 2272kB)

... to separate because they are very similar, yet their chromatographic resolution may be required. For example that contain isobaric analytes, chromatographic resolution is essential. In the example shown in Figure 3...

Evaluation of a Simple Method for Methylmalonic Acid Analysis in Human Plasma by LC-MS/MS

...rovides complete chromatographic resolution from isobaric succinic acid in plasma samples. Ex oration, and/or SPE. Additionally, chromatographic resolution can be difficult to achieve between MMA ... chromatographic resolution from isobaric succinic acid in plasma samples. Excellent chromatographic results were...

Featured Application: LC Analysis of Vitamin D Epimers on Raptor FluoroPhenyl Columns Fast, Accurate LC-MS/MS Analysis of the C3 Epimer of 25-Hydroxyvitamin D on Raptor FluoroPhenyl Columns

... D analysis; however, because the biomarkers and their epimers are isobaric, chromatographic utility is limited by incomplete resolution of the biomarkers and their epimers as well as by analysis ... on a C18 column. The new Raptor FluoroPhenyl column provides ample chromatographic resolution...

5.5 Minute LC-MS/MS Analysis of Mycotoxins in Peanut Powder (PDF 945kB)

... to provide adequate chromatographic resolution. The selectivity of the Raptor Fluorophenyl column...

Rapidly Analyze a Wide Range of Glycol Ethers by GC-MS Using the New Rxi-1301Sil MS Column (PDF 1176kB)

... in Figures 3 and 4, chromatographic resolution is reduced in exchange for speed in this situation the New Rxi-1301Sil MS Column By Rebecca Stevens and Chris English Abstract Chromatographic conditions...

Excellent Resolution of EU-Regulated Azo Dye Aryl Amines by GC-MS on the Rxi-35Sil MS GC Column (PDF 857kB)

... with High Chromatographic Resolution It is well established that MS is a powerful tool Excellent Resolution of EU-Regulated Azo Dye Aryl Amines by GC-MS on the Rxi-35Sil MS GC Column...

Raptor FluoroPhenyl LC Columns Brochure (PDF 3042kB)

... provides adequate chromatographic resolution so accurate results are generated and the proper diagnosis superficially porous particles (also known as SPP or “core-shell” particles) with the resolution of highly...

News: Evaluation of a Simple Method for Methylmalonic Acid Analysis in Human Plasma by LC-MS/MS

Author: Justin Steimling and Frances Carroll Published By: Restek Corporation Year of Publication: 2019 Link: https://www.restek.com/Technical-Resources/Technical-Library/Clinical-Forensic-Toxicology/cft_CFAN3010-UNV Abstract: A new LC-MS/MS method for methylmalonic acid (MMA) analysis was developed that provides complete chromatographic resolution from isobaric succinic acid in plasma samples. Excellent chromatographic results … Continue reading

GC-MS Analysis of Phthalates: Comparison of GC Stationary Phase Performance (PDF 1255kB)

... better chromatographic resolution compared to LC-MS for phthalate determination. The most commonly (FID), and mass spectrometry (MS). In this study, Pro EZGC gas chromatographic modeling software...

Analysis of Synthetic Cannabinoids and Metabolites: Adding New Compounds to an Existing LC-MS/MS Method (PDF 870kB)

... minutes. When analyzing synthetic cannabinoids, chromatographic resolution of some target compounds on the market. When developing methods for these compounds, optimization of analysis time, resolution between...

Fingerprinting Crude Oils and Tarballs using Biomarkers and Comprehensive Two-Dimensional Gas Chromatography (PDF 2138kB)

.... Advantages include increased chromatographic resolution of potential diagnostic biomarkers, a structured , and increased resolution of biomarkers, which reduces the potential for isobaric interferences. Experimental...

One Stop Shop for EPA Method 535 Reliably Analyze Acetamide Herbicide Degradates by LC/MS/MS

.... Chromatographic resolution of alachlor ESA and acetochlor ESA isomers. Meet method (MRM) transitions, and thus must be separated chromatographically. Resolution of all...

News: Simplified Methylmalonic Acid Analysis without Derivatization in Human Plasma by LC-MS/MS

Published By: Restek Corporation Year of Publication: 2018 Link: http://www.restek.com/Technical-Resources/Technical-Library/Clinical-Forensic-Toxicology/cft_CFSS2829A-UNV Abstract:  Methylmalonic acid analysis is an important clinical test for diagnosing vitamin B12 deficiency as well as methylmalonic acidemia. Methods typically require extensive sample preparation, which involves significant time and expense. The LC-MS/MS … Continue reading

A Comprehensive Approach to Pesticide Residue Monitoring, Including Non-target Analysis, for Fruits, Vegetables, and Nuts, Using QuEChERS, LC-MS/MS, and GCxGC-TOFMS (PDF 2552kB)

... chromatographic resolution of compounds is not always essential, as selected ions or selected reaction monitoring nonvolatile pigments, like chlorophyll, that cannot be chromatographed by GC. If left in the sample...

Restek Advantage, 2012.1 (PDF 14846kB)

... ionization LC sources. With MS, complete chromatographic resolution of compounds is not always essential Analytics recently presented a Kaizen award to their High Resolution Mass Spectrometry (HRMS) Department...

Guide to Preparing and Analyzing Semivolatile Organic Compounds (PDF 6275kB)

....e., extracted ions) for each compound so that chromatographic resolution of each compound is not necessary . Typically, only isomers have similar spectra, so chromatographic resolution is required only...

The Role of Selectivity in Liquid Chromatography Method Development

... is the separation of chemical compounds. The resolution of one analyte from another in a chromatographic separation are maintained, chromatographic resolution will result. Complex mixtures will contain a multitude...

Restek GCxGC Columns: Your One Source for 2D Gas Chromatography (PDF 9170kB)

...) amounts for each compound. Chromatographic resolution is very important when you don’t have the ability , sample preparation, and analysis to help chromatographers worldwide and is still a “hands on” scientist...

Featured Application: Mycotoxins in Peanut Powder on Raptor Biphenyl 5.5 Minute LC-MS/MS Analysis of Mycotoxins
in Peanut Powder

..., the Raptor FluoroPhenyl phase may be necessary to provide adequate chromatographic resolution...

Optimizing the Analysis of Volatile Organic Compounds (PDF 2705kB)

... your chromatographic and peripheral systems. This guide presents information on the common US concentrated on the trap are desorbed to the chromatograph for separation, identification and quantification. 3...

Will Pro EZGC Chromatography Modeling Software Work For You? We Put It to the Test!

... compounds are difficult to separate because they are very similar, yet their chromatographic resolution may are developing a GC-MS method for a list of compounds that contain isobaric analytes, chromatographic resolution...

ChromaBLOGraphy: The Rtx-1614 separates MORE halogenated flame retardants than just Polybrominated Diphenyl Ethers (PBDEs)!

Halogenated flame retardants (HFRs) are used in numerous household and office products, including electronics, carpeting and furniture.  Polybrominated diphenyl ethers (PBDEs), a subset of HFRs, have been found to be persistent and bioaccumulative in the environment.  While the main technical mixtures of PBDEs have mostly been phased out of production and use, the concentrations in […]

Column Choice: A Critical Factor for Successful UHPLC Integration

... in liquid chromatographic techniques, offering higher pressure limits, faster throughput, and the promise in chromatographic properties such as peak shape, retention time, and even selectivity. These differences can result...

Analysis of Synthetic Cannabinoids and Metabolites: Adding New Compounds to an Existing LC-MS/MS Method

..., chromatographic resolution of some target compounds that cannot be determined by MS alone is essential of analysis time, resolution between metabolites, method robustness, and the ability to add emerging compounds...

Rapidly Analyze a Wide Range of Glycol Ethers by GC-MS Using the New Rxi-1301Sil MS Column

... elution order. However, as shown in Figures 3 and 4, chromatographic resolution is reduced in exchange Abstract Chromatographic conditions were developed for a fast GC-MS glycol ether ... Chromatographic conditions were developed for a fast GC-MS glycol ether analysis on the Rxi-1301Sil MS column. This column provides better resolution and faster run times than the thick film...

Excellent Resolution of EU-Regulated Azo Dye Aryl Amines by GC-MS on the Rxi-35Sil MS GC Column

... Chromatographic Resolution It is well established that MS is a powerful tool for the deconvolution of coeluting chromatographic peaks, but there are certain pairs of analytes that can only be independently...

ChromaBLOGraphy: Building up pressure on HPLC?

We’ve all experienced a pressure error on HPLC at some time or another. Here are my best suggestions on handling them. Establish ground rules-This will help to define the problem and distinguish if there really is one. 1.     Check your programmed max pressure limit. Be aware of what the operating limit is for your system and [...]

Restek LC Columns and Accessories (PDF 17409kB)

... chromatographers the best of both worlds. By being the first to combine the speed of SPP with the resolution the Most Expensive Consumable in Your Chromatographic Assay with Restek LC Guards EXP Direct Connect...

Fingerprinting Crude Oils and Tarballs using Biomarkers and Comprehensive Two-Dimensional Gas Chromatography

...-dimensional gas chromatography. Advantages include increased chromatographic resolution of potential diagnostic of selected ion monitoring, and increased resolution of biomarkers, which reduces the potential for isobaric...

GC-MS Analysis of Phthalates: Comparison of GC Stationary Phase Performance

...cording to the literature, GC-MS has better chromatographic resolution compared to LC-MS for phthalate determ nd mass spectrometry (MS). In this study, Pro EZGC gas chromatographic modeling software was e ... analysis times and good resolution for both 18 regulated phthalates and an extended list of 40 compounds...

A Comprehensive Approach to Pesticide Residue Testing, Including Non-Target Analysis, for Fruits, Vegetables, and Nuts, Using QuEChERS, LC-MS/MS, and GCxGC-TOFMS

... ionization LC sources. With MS, complete chromatographic resolution of compounds is not always essential be chromatographed by GC. If left in the sample these compounds rapidly contaminate the GC inlet liner, the inlet...

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  • 37 matching Resources were found.

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