Shimadzu Auto Injector

Reproducibility and reliability are what make an auto injector valuable to a laboratory. Reproducibility can be adversely affected not only by less than optimum injection conditions, but through sample evaporation as well.Reliability is a measure of how well the instrument faithfully reproduces injection of the sample. The AOC-20i ensures that both of these needs are met.
To illustrate typical reproducibility of different types of compounds and demonstrate the inertness of the GC injection port, a 500 ppm Grob test mix standard sample was injected 10 times.
Note that the coefficient of variation (C.V.%) was less than 0.3% for all compounds. Also note that neither the acidic (peaks 2 & 3) nor the basic compounds (peaks 5 & 8) show any evidence of tailing, indicating the inertness of the sample path in the GC.