PERMEATION TUBE APPROACH TO LONG-TERM USE OF AUTOMATIC SAMPLER RETENTION INDEX STANDARDS

摘要

A permeation tube that is sealed internally in a commercially-available automatic sampler vial provides a simple and convenient method of preparing, using, and storing standard retention index samples for long periods of time. The approach is especially suited to the handling of volatile organic compounds that are very important in fuels research, alternative refrigerant research and in many environmental analyses. It also provides the very desirable feature of dispensing sample that is at very low concentration or even at infinite dilution, since no commercial automatic sampler is currently capable of doing this for the analyst. The device is very simple, and can be constructed and prepared with a liquid sample in a few minutes. It requires the use of minimal quantities of sample, and substantially decreases the hazards associated with handling volatile organics in the laboratory. [References: 14]