Basics & Fundamentals - Gas Chromatography
Basics & Fundamentals: Gas Chromatography. Introduction . Gas chromatography (GC) is an analytical methodology, which was devised by Nobel Laureate, Martin, et al. in 1952. More than 60 years after the award, GC systems are widely commercialized and used in various industries, capable of both of quantitation and qualifcation.
GC troubleshooting - GC troubleshooting - Hints and tips
GC troubleshooting Prevention. Many GC problems can be prevented if the column is properly installed and GC is maintained routinely. For example, replacing septa or liner at regular intervals and keeping the injector and detector clean and well-maintained shoud solve many problems.
Tips and Tricks for the Lab: Column Troubleshooting and
Aug 07, 2012 · To begin collecting fractions, place a suitable container under the column and open the stopcock or tap. For every column there is an optimal flow rate. Adjust the stopcock to control the flow. If the flow rate is too slow, diffusion processes will lead to band widening (Fig. 1, a).
1.5mL 9mm Short Thread Vial ND9 for GC and HPLC
Product Description. 1.Short screw Thread ND9 vials (11.6*32mm) for GC and HPLC. 2.Wide opening can effectively prevent the risk caused by the excursion of injection needle. 3.Available as closed top screw seals or with centre hole. 4.Available with black or blue screw caps with 9mm thread. 5.Vials with integrated Micro-Insert are also available.
Troubleshooting GC peak shapes - Crawford Scientific
Jan 09, 2018 · Issues with peak tailing can be caused by many factors including (in priority order that I would investigate the problem) Poor column cut at the inlet – column has a ragged cut or is not cut at 90 o to the column wall. Re-cut the column (2-5cm) and inspect the quality of the cut with a magnifier or low power microscope.
What causes a “ghost” peak and what can I do to prevent this
To eliminate or prevent these ghost peaks: Use an HPLC system with minimum pressure change during the load and inject steps. Please note that the pressure during load is only shown on the front panel and typically not part of the data recorded in the HPLC data file. If the ghost or system peak is reproducible in multiple blank injections, you
GC Columns and Consumables Primer - Fisher Sci
GC Septa GC Ferrules GC Columns GC Syringes GC Liners Thermo Scientific GC consumables are available for both Thermo Scientific and Aijiren instruments. Selection of the correct GC columns and accessories is critical to ensure optimum system performance. The selection guide below is designed to simplify this process Product Selection Guide
VICI - Valco Instruments Company Incorporated
VICI - your factory source for top quality products for gas chromatography, liquid chromatography, medical research and practice, flow injection analysis, HPLC, SFE, and SFC.
9mm Autosampler Inserts - Thermo Fisher Scientific - US
Clear glass or polypropylene inserts for 9mm HPLC and GC autosampler vials are available in a variety of configurations with usable volumes from 160μL to 3.5mL.
1.5mL 11mm Snap Ring Vial ND11 for GC and HPLC
1.5mL/1.8mL snap cap vials ND11, wide opening HPLC vials with matched PE snap cap seals ND11, PTFE/rubber septa & micro-inserts. Send Inquiry Chat Now TAGS: 2ml-vial-price hplc-vials hplc-vials-price chromatography-vials 2ml-autosampler-vials vials-chromatography-2ml vials-for-sale iso-vial snap-top-vials
How to create a HPLC/GC Method in SHIMADZU LABSOLUTIONS
How to create a method in SHIMADZU LABSOLUTIONSShimadzu LabSolutions features an innovative operating environment and provides complete data management to en
wide opening vial | Sigma-Aldrich
Certified QSertVial ™ (vial with fused-in insert) kit, screw thread, 12 x 32 mm, 0.3 mL, pkg of 100. 4 Product Results
2 mL Screw Top Vials and Screw Caps | Aijiren
Aijiren 2 mL screw top vials are constructed from from Type 1 borosilicate glass, with low metal content, to protect your sample from destabilizing or leaching. The associated 9 mm screw caps come with your choice of cap septa constructed from either PTFE/silicone or natural red rubber.
Which technique to use – GC or HPLC?
Apr 27, 2017 · The focus of the present article is on differences between GC and HPLC techniques so as to help you decide the appropriate technique for the particular analysis in hand. Mobile Phase. Mobile phase acts as a carrier of sample through the system. In HPLC the mobile phase is a liquid whereas in Gas chromatography it is a gas.
Autosampler Vials & Caps for HPLC & GC | Thermo Fisher
Autosampler vials & caps for HPLC, LC/MS, GC and GC/MS. There’s a Thermo Scientific vial & closure for every HPLC, GC, MS instrument, application, and budget. Screw Vials, Caps, Septa, Inserts & Kits.