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Restek Technical Guides

   

Guide to Preparing and Analyzing Semivolatile Organic Compounds

Analyses of semivolatile organic compounds in environmental samples hold many challenges, particularly during sample preparation and injection onto the capillary GC column. At the same time, quality assurance/quality control requirements can be rigorous. This 28-page guide offers valuable information across the entire scope of the analysis: sample extraction and cleanup, column selection, GC analysis (including hints for reducing discrimination in the injection port), and quantification. Lit. Cat.# 59411A
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Analyzing Alcoholic Beverages by Gas Chromatography

Volatile component profiles of alcoholic beverages reveal a wide range of compounds: acids, alcohols, aldehydes, and others. This 16-page guide describes packed column GC and capillary GC approaches to monitoring these complex mixtures of analytes. A separate section is devoted to detailed information about quantifying trace sulfur compounds in beer.
Lit. Cat.# 59462
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Instrument Tube Fitting Installation Manual

An excellent reference tool for chromatographers who install fluid line systems, especially when making significant changes to a current system or planning a new one. In addition to the "do" and "do not" recommendations for cutting tubing and installing fittings, the 76-page guide includes a wealth of background information: service recommendations and temperature ranges for tubing of various composition, ASTM dimensional specifications, thread identification, much more. Published by Parker Hannifin Corporation. Lit. Cat.# 59612A
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Analyzing Cleaning and Personal Care Products
by Gas and Liquid Chromatography

Soaps, detergents, solvents, and many other components of household cleaners and personal care products are effectively monitored by GC and/or HPLC. Sometimes either approach can be used for the same purpose, but one will offer time, accuracy, or economic advantages over the other. Sometimes the approach is clear, but the choice involves alternative stationary phases. This 16-page guide presents numerous examples of GC and HPLC analyses of these diverse products. Lit. Cat.# 59738
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Operating Hints for Using Split/Splitless Injectors

What design of inlet liner is best for analyzing dirty samples by split injection? What design minimizes analyte breakdown in splitless injections? Learn about the advantages of these commonly used sample injection techniques — and their disadvantages — to obtain the best results and avoid problems. This 36-page guide is focused on system optimization, maintenance, and troubleshooting. An extensive selection of inlet liners and other products is included.
Lit. Cat.# 59880A
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A Guide to Direct and On-column Flash Vaporization Injection

Compared to splitless injection, direct flash vaporization injection—direct injection—offers greater sensitivity, simpler operation, and reduced potential for adsorbing active compounds. This 24-page guide discusses the advantages and disadvantages of direct injection, compared to other techniques, and examines considerations such as modifying a splitless inlet, retrofitting a packed column injection port, and the need for make-up gas. Operating parameters such as flow rates and sample injection volume are reviewed. Lit. Cat.# 59882A
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Optimizing the Analysis of Volatile Organic Compounds

This 72-page guide offers a concise, but thorough, overview to analyzing volatile organic compounds in environmental samples. Sections describe purge and trap theory, adsorbents and traps, troubleshooting purge and trap systems, GC system configurations for narrow-bore or wide-bore capillary columns, and detection systems and how they work. A large selection of chromatograms shows analyses obtained through various approaches and illustrates results of changing chromatographic parameters to achieve specific goals. Lit. Cat.# 59887A
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A Guide to the Analysis of Chiral Compounds by GC

In some analyses, particularly with pharmaceutical or flavor and fragrance compounds, enantiomer pairs must be resolved for separate quantification. Five cyclodextrin-based Restek chiral capillary GC columns offer a unique range of selectivities, to enable you to accomplish these often-difficult separations. Many example chromatograms in this 24-page guide will help you find the best column—or columns—for your particular need. Lit. Cat.# 59889
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Selection Guide for Polar WAX GC Column Phases

Polyethylene glycol-based stationary phases are the most versatile and thermally stable polar GC phases, but PEG-based columns from different manufacturers can differ significantly in chemical makeup and performance. Restek PEG-based capillary columns are designed for specific categories of applications, for low bleed, excellent inertness, and unsurpassed column-to-column reproducibility. This 16-page guide discusses the performance characteristics of and applications for Restek PEG-based columns. Lit. Cat.# 59890
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A Guide to Preparing and Analyzing Chlorinated Pesticides

Analyses of chlorinated pesticides can be difficult because samples often are contaminated with non-target compounds (e.g., lipids), and the method can require rigorous quality control. Our 24-page guide covers sample extraction methodology, sample cleanup, and chromatography. A chromatographic analysis of widely used chlorinated herbicides also is illustrated. One of our most popular technical guides. Lit. Cat.# 59892
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A Technical Guide for Static Headspace Analysis Using GC

Static headspace analysis will save you time and money when assaying a variety of sample matrices—and often is easier than alternative sampling approaches. This 20-page guide discusses basic principles, instrumentation, applications, and troubleshooting. Restek capillary GC columns and an extensive selection of accessories will simplify getting started. Lit. Cat.# 59895A
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A Guide to Passive Air Sampling

Collecting a representative sample of ambient air for analysis, analyzing the sample, and readying the sampling equipment for collecting another sample is not difficult, but the processes involved must be followed carefully to ensure accurate data are obtained. This 20-page guide describes the components of a passive sampling train, then presents step-by-step procedures for sampling, for cleaning the sampling train and canister, and for certifying the train and canister clean. Lit. Cat.# 59977B
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