chromatographic data Articles

  • Get Empowered: Quickstart Interface - Tip #1

    Welcome back to Get Empowered! My tip-of-the-week blog for Empower Software kicks-off by taking a closer look at the Empower QuickStart Interface. There is so much to cover in this series, so I have broken it up in to three tips. Tip #1: An Overview ...


    By Waters Corporation

  • Changing the Rules with Mass Detection

    How simplified detectors can provide mass data for every analytical run and speed up method development With access to multiple mass spectrometry systems of varying degrees of sophistication, Davy Guillarme (University of Geneva, Switzerland) wasn’t actively looking for new mass detection solutions. Nevertheless, the Waters ACQUITY QDa mass detector caught his eye. Why? Because it opens a ...


    By Waters Corporation

  • Optimized data handling for automatically calculating the Hydrocarbon Index (HI) of “Produced Waters” from gas chromatographic analysis with Galaxie™ Software

    The extraction of Oil and Gas from Subsea wells produces large quantities of waste water contaminated with hydrocarbons. These “Produced Waters” are disposed of directly into the oceans. Determination of the Hydrocarbon Index (HI) is required to meet environmental legislation.Traditionally infra red methods have been used but these require solvents extraction using solvents that present their own ...


  • Evaluating Guidelines for Air Sampling Methods Utilizing Chromatographic Analysis

    The following evaluation guidelines were developed to provide chemists of the Methods Development Team with a uniform and practical means for evaluating sampling and analytical methods that utilize chromatographic techniques. The guidelines define sampling and analytical parameters, specify required laboratory tests, statistical calculations, and criteria for acceptance, and provide a detailed ...

  • Cosmetics Safety Testing: A Path to Data Integrity and Traceability

    Did you happen to see the discourse about Cosmetics Regulations last week in the news media? The New York Times published a news article (August 15, 2016) by Eric Lipton and Rachel Abrams entitled: “ ...


    By Waters Corporation

  • EPA Method 8270D Analysis Using Narrow-bore GC Columns and Fast Data Acquisition with a Quadrupole GCMS System

    Analytical support of environmental programs has been conducted for several decades using standard-bore capillary columns (0.25mmid) and quadrupole GCMS systems. Depending on method conditions and program requirements, the QC measures can consume a significant portion of a 12-hour shift, leaving less time for analysis of real-world samples. Typical cycle times (time from beginning of a run to the ...

  • Advancing Omics Research and Reducing Bias with New MS Technology for Data-Independent Acquisition Experiments

    Targeted LC-MS based assays are increasingly applied in the post-discovery Omics area with an emphasis on validation, the first of many phases in translational research; and in studies that are aimed at gaining the understanding of biological systems in terms of drug development and treatment. Understanding the context of analytical results is driving current research, and therefore driving the ...


    By Waters Corporation

  • GC Analysis of Crude Oil Samples in Compliance with ASTM D5307

    In the ASTM D5307 test method, crude oil containing components with boiling points to temperatures in excess of 538C (C44 or equivalent) are analyzed by a simulated distillation GC system by the internal standard method. A detailed boiling point distribution graph is created for the fraction with boiling points lower than 538C. The fraction with boiling points above 538C is calculated as ...

  • Testing of Pharmaceutical & Cosmetic Raw Materials & Final Product Formulations for CODEX, USP/NF & BP Regulations

    There are STANDARD Guidelines used to define the Identification and Purity of compounds used in Pharmaceutical and Cosmetic formulations, as well as the final Products. These protocols are described in great detail in the various Monographs of the United States and British Pharmacopoeias, the National Formulary (USP/NF and BP), the International FAO/WHO Codex (CODEX) and other Regulatory ...


    By Buck Scientific Inc

  • Semi-volatile organics in drinking water using EPA method 525.2 optimized for greater sensitivity

    The US EPA Drinking Water Manual contains the methods used to identify and quantify regulated and unregulated organic drinking water contaminants. Included in this manual is Method 525.2, a Gas Chromatographic/ Mass Spectrophotometric (GC/MS) technique for the determination of semi-volatile organic compounds. Method 525.2 can be used for the identification and quantification of a group of ...


    By PerkinElmer, Inc.

  • Using Deconvolution Software to Identify Unknown Compounds

    Many software packages for the qualitative and quantitative analysis of GC/MS data allow the operator to indicate the target compounds of interest and generate a report that includes the observed concentration of each target compound in the sample. Given the targeted nature of the analysis, additional (i.e. unexpected) compounds present in the sample are not identified, unless the operator ...


  • Prediction of partition coefficients for complex environmental contaminants: Validation of COSMOtherm, ABSOLV, and SPARC

    Prediction of partition coefficients is essential for screening of environmentally relevant compounds. Prediction methods using only the molecular structure as input are especially useful for this purpose. In the present study, we validated three prediction methods, COSMOtherm, ABSOLV and SPARC, which are based on more mechanistic approaches than most other quantitative structure activity ...


    By John Wiley & Sons, Ltd.

  • Free radical destruction of haloacetamides in aqueous solution

    Haloacetamides are disinfection byproducts (DBPs) formed through chlorine/chloramine disinfection processes in drinking waters and have been recently highlighted in the US national Reconnaissance Survey. These species occur at low concentrations, but have been determined to have high cytotoxicity and mutagenicity and therefore may represent a human health hazard. Advanced oxidation/reduction ...


    By IWA Publishing

  • Online Odors Monitoring in Waste Water Treatment Plants

    Odors are very distinct air contaminants as they generate nuisances (see note at the end). The factors playing a role in the determination of odor annoyance are : odor concentration and intensity, frequency, appreciation, duration, synergy and location. Chromatotec proposes an automated solution to well identify the origin and the level of odors. Technology Description We offer a ...


    By Chromatotec Group

  • Detection and measurement of GWGs in semiconductor fab facilities

    Problem Statement Various processes and tools in the modern wafer fab plant produce effluent streams that contain unacceptably high levels of perfluorocarbon GWGs (greenhouse warming gases). These effluent streams are abated by plasma incineration and wet scrubbers and other techniques. It is necessary to measure the destruction removal efficiency (DRE) of the various abatement methods ...


    By CIC Photonics, Inc.

  • Natural Gas: Complete Analytical Solution

    Chromatotec® has developed in its Research & Development laboratories, a new instrument for hydrocarbon (C1-C6+) measurements and calorific values as well as WOBBE index computation. This analyzer is based on chromatography principle using a Thermal Conductivity Detector (TCD). The sample will be separated into the column and quantified by the detector. A difference of thermal ...


    By Chromatotec Group

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

    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 using a high pH liquid/liquid extraction. ...


    By Restek Corporation

  • Virus and protein separation using Nano alumina fiber media

    Nano alumina fibers, 2 nm in diameter and approximately 0.3 μm long are electroadhesively grafted to a microglass fiber. A non-woven media is formed that has a zeta potential of ~+40 mV at pH 7. The media is capable of high retention of submicron particulates at flow rates up to 160 L/m2/min. The media is manufactured by conventional wet-laid paper making technology. Argonide, the inventor of ...


    By Argonide Corporation

  • Software solution for standard and Highly sophisticated GPC systems case study

    Today's analytical laboratories require universal, flexible and open software solutions to cope with the ever changing needs. This report illustrates how these requirements for chromatographic data processing software can be met in different types of laboratories. Acquisition and Processing of Chromatography Data In former times an analytical chemist spent most of the time with ...

  • Innovations in Site Characterization

    This case study is the first in a series designed to provide cost and performance information for innovative tools that support less costly and more representative site characterization. These case studies will include reports on new technologies as well as novel applications of familiar tools or processes. They are prepared to offer operational experience and to disseminate information about ...


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