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Practical GC Troubleshooting and Maintenance practical course
2 Day Course | GC Level 2

A logical approach to GC Troubleshooting and Maintenance is explored in this two-day course. Commonly encountered problems and best practices are examined for all major system components including gas handling, inlet system, oven, column and detector.

Examination of separation chemistry, interrogation of poor peak shape and retention problems are a fundamentally important part of the course, leading to increased awareness of troubleshooting principles.
Practical exercises are fundamental to this course and industry standard equipment will be used to carry out a wide range of laboratory-based tasks.

  • We limit numbers to 6 per course so that each delegate gets the opportunity to ask questions and fully participate in practical exercises
  • When delivered on-site we can design the course material to suit your specific training needs
  • Customisable written assessments are available if required

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on site Practical GC Troubleshooting and Maintenance
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download course pdfAll components of the GC system and associated problems are systematically studied. The use of chromatograms as diagnostic tools is explored in depth, including baselines, peak shape and retention time inconsistencies, spurious peaks, etc.

Laboratory based sessions are included to make an all-encompassing and thorough two day course

Who is this course for

This course is designed for those relatively new to GC, or for those users of GC systems who want to gain a deeper insight of their instruments. Ideally will follow-on from attendance to the Fundamental GC training course.

Previous knowledge

Some previous knowledge of gas chromatography and basic experience are recommended but not essential.

What you will learn

  • Instrument problems - identifying the issues
  • Developing troubleshooting strategies
  • Column installation
  • Inlet maintenance
  • Inlet and oven parameters
  • Detector maintenance
  • Common maintenance schedule operations
  • Investigative operations

Approaches to Logical Troubleshooting

  • Logical troubleshooting
  • System overview
  • Component perspective
  • Symptomatic perspective
  • System maintenance records
  • Symptom/Causes/Diagnosis and solution

Inlet Maintenance

  • Stripping the inlet: liner, gold seal, septum and split vent trap
  • The gas flow path and hydraulic control
  • Pressure test inlet
  • Inlet troubleshooting

Column Installation

  • Installation and conditioning of a capillary column
  • Column length calculation
  • Run Check Out sample
  • Time, peak area and efficiency
  • Column troubleshooting

Inlet and Oven Parameters

  • The effect of split ratio on peak shape and quantitative accuracy
  • Investigating oven initial temperature
  • Inlet troubleshooting questions

Detector Maintenance

  • Stripping and cleaning the FID

Troubleshooting Strategy

  • Bringing it all together with questions and a practical challenge!

Training Calendar

Click on a title below to download a detailed course description or click a date and book your course.

Can't find a suitable training course? Call 01357 522 961 or email us.

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Liners for Split/Splitless Injection

The selection and correct use of liners is of critical importance in Split and Splitless GC injection. The liner has many functions which include:

  • To constrain the volatilised components of the sample
  • To allow the sample to be split through excess sample and carrier escaping from the liner outlet (some instrument designs)
  • To cause mixing of the sample vapours with the carrier (split injection)
  • To prevent involatile material from fouling the GC column
  • To avoid analyte thermal degradation
  • To decrease the potential for inlet discrimination

All of the above are achieved through a number of features of the liner design. These features are often poorly understood and the interactive diagram opposite outlines the main features of typical GC inlet liners for a better understanding, The main variables in GC liners selection are:

  • Liner internal diameter
  • Packed / Unpacked
  • Packing Position
  • Liner internal geometry and features including;
  • Upper Gooseneck
  • Lower Gooseneck
  • Inverted (Jennings) Cup
  • Baffled
  • Deactivation Type

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