Download HPLC: A Practical User's Guide by Marvin C. McMaster PDF

By Marvin C. McMaster

This moment variation of the vintage instruction manual information how you can manage an HPLC process that capitalizes at the most up-to-date concepts. It covers new suggestions in high-temperature, micro-flow, and ultra-fast chromatography, the linking of an HPLC to a mass spectrometer, and extra. whole with a CD-ROM and appendices, this advisor has every little thing chromatographers want to know to with a bit of luck separate, establish, purify, and quantify compounds.

Note: CD-ROM/DVD and different supplementary fabrics will not be integrated as a part of e-book dossier.

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Additional resources for HPLC: A Practical User's Guide

Sample text

Many of these can be traced to the solvents used, especially water. Organic solvents for HPLC are generally very good. There are three rules of thumb to remember: always use HPLC grade solvents, buy from a reliable supplier, and filter your solvents and check them periodically with your HPLC. Most manufacturers do both GLC and HPLC quality control on their solvents; some do a better job than others. The best way to find good solvents is to talk to other chromatographers. Even the best solvents need to be filtered.

54-mm filter in a Sweeny filter holder or using a disposable plastic filter cartridge. The same types of filter materials are available as those discussed in solvent filtration: Teflon, nylon and cellulose. In-line filters are available that fasten between the syringe barrel and the injection needle. These are useful if you are not sample limited or are doing repeat injections of the same material. I have found that most chromatographers won’t bother with the time, cost, and sample loss that this entails, although I am finding an increase in the use of syringe in-line filters.

These fittings slide over the tubing and are tightened like stainless steel fittings, but are not permanently “swagged” onto the tubing and can be reused. They are designed to give a better zero-dead-volume fitting, but they have pressure and solvent limits. They are also more expensive, but only in the short run. 2 Connecting Components New pumps are generally shipped with isopropanol or a similar solvent in the pump head, and this will need to be washed out. Always try and determine the history of a pump before starting it up.

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