ms columns Articles

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Rxi-624Sil MS Exceptionally Inert, Low Bleed Columns for Volatiles Analysis

by Restek Corporation  (May 24, 2012)

- Optimized selectivity for volatiles and polar compounds ensures good separations. - Highly inert columns improve accuracy and allow lower detection limits, even for active compounds. - Most thermally stable 624 column available; low bleed, fully MS compatible. While mid polarity 624 columns are widely used for analyzing polar analytes and ...

2.1 mm ID micro carbamates column ideal for LC-MS confirmation

by Pickering Laboratories, Inc.  (Jun. 10, 2010)

Post-column derivatization of carbamates with hydroxide and OPA is the method of choice for the detection of carbamates because of its high selectivity and high sensitivity (US EPA 531.1 & AOAC 985.23).  To confirm the finding of carbamates in the tested samples, there are various possibilitites: To confirm the finding of carbamates in ...

Aflatoxin & ochratoxin sample preparation columns

by Pickering Laboratories, Inc.  (Jun. 10, 2010)

Simultaneous Analysis of Aflatoxins and Ochratoxin A - Sample Preparation Aflatoxins and Ochratoxin A are produced by fungi, e.g. Aspergillus and Penicillium species. Therefore both toxin types are found together in many foods and animal feeds, e.g. cereals. Thus it is appropriate to analyze one extract for the occurrence of both mycotoxins in a ...

Using Headspace Sampling With Capillary Column GC-MS to Analyze Trace Volatile Organics in Water and Wastewater

by American Water Works Association (AWWA)  (Oct. 1, 1988)

Headspace sampling combined with capillary column gas chromatography-mass spectrometry analysis was evaluated for use in the investigation of priority pollutants in water and wastewater. A 3 mL sample loop and cryogenic trapping at minus 80 degrees C were employed to increase the sensitivity into the nanogram-per-liter range. Separations were ...

US EPA Method 525.2 Semivolatiles by GC-MS on the Supelco SLB™-5ms

by Sigma-Aldrich/Supelco  (Dec. 31, 2008)

US EPA Method 525.2 describes the procedure for the extraction and analysis of semivolatile organic compounds from drinking and source water. The compound list includes polynuclear aromatics, phthalates, pesticides, and polychlorinated biphenyls.  This application illustrates the separation of a majority of the single peak analytes listed in ...

Fast GC-MS Analysis of US EPA Method 8270D Semivolatiles Using Supelco SLB-5ms

by Sigma-Aldrich/Supelco  (Dec. 31, 2006)

US EPA Method 8270D specifies a procedure for the determination of semivolatiles in solid waste and ground water samples. The method specifies that all analyses must be completed within 12 hours of meeting specific MS tune criteria. In this application, the principles of fast GC were applied to analyze a typical 8270 analyte list in under 8.5 ...

LC/MS/MS analysis of metabolites of synthetic Cannabinoids JWH-018 and JWH-073 in Urine

by Restek Corporation  (May 24, 2012)

Abstract A liquid chromatographic method was developed to resolve a comprehensive set of metabolites of JWH-018 and JWH-073. In addition to the chromatographic analysis method, an extraction method was developed to recover a broad range of synthetic cannabinoid metabolites, including carboxylic acid metabolites that are not traditionally recovered ...

Advances in Bromine Speciation by HPLC/ICP-MS

by PerkinElmer, Inc.  (Oct. 28, 2011)

Bromine is a natural component found in waters, most commonly as the bromide ion, Br-. A common procedure for purifying drinking waters is treatment with ozone to kill bacteria. A byproduct of ozonolysis is the conversion of bromide to bromate (BrO3-), a known carcinogen. Therefore, a need exists to measure both bromide and bromate in drinking ...

Lower Detection Limits with Ground-Breaking Column Technology

by Restek Corporation  (May 24, 2012)

Rxi technology unifies outstanding inertness, low bleed, and high reproducibility into a single high performance column line. Take variation out of the equation and get the most consistent results for trace-level analysis with Rxi columns. phases available Rxi-1ms Rxi-1HT Rxi-5ms Rxi-5Sil MS Rxi-5HT Rxi-XLB ...

GC-MS Analysis of Polychlorinated Dibenzodioxins and Polychlorinated Dibenzofurans

by Sigma-Aldrich/Supelco  (Jun. 5, 2012)

Polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) consist of 210 different compounds with varying degrees of toxicity, and the 17 congeners with chlorine substitution in the 2,3,7,8 positions are considered the most toxic. This chromatogram illustrates the separation of a 17 component 2,3,7,8-substituted PCDD and ...

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