The HP model 7670A automatic sampler uses a GC syringe the same way you do...except that it works completely unattended
The 7670A Automatic Sampler completely automates the measurement and injection of a sample into a GC. After loading it with as many as 36 samples, you push the RUN button—and then go do something useful for the next few days. Meanwhile the 7670A, under the foolproof and continuous direction of its Control Unit, performs the complete job, completely unattended: 1—washes the syringe by aspirating a full bore of new sample 5 or 11 times as desired, and dumps the washings into a waste tray . . . to minimize sample carryover—and pumps the pre-selected sample volume in and out of the syringe 5 t i m e s . . . to eliminate bubbles 2—measures the desired sample volume with machine-reproducibility... to improve precision 3—injects the sample into the GC as a ' s l u g ' . . . to improve reproducibility 4—indexes the carousel-like tray to the next sample (or repeats the previous sample, if you prefer) and re-starts the procedure . . . for full automation As you can see, the 7670A does the job the same way that a good chromatographer does . . . but with two exceptions. It is consistently more precise than even a skilled technician because it does everything with machinereproducibility . . . and it is substantially more economical because it operates completely unattended all day, all night, all week-end long. Priced at $3250, the 7670A can be installed directly on HP Series 7620, 5750 and 810 GC's; and the 7671A is installed directly on Series 7610,5700 and 402 GC's . . . another reason why most chromatographers choose HP for all GC instruments and accessories. Hewlett-Packard, Route 41, Avondale, Pa. 19311. In Europe: 1217 MeyrinGeneva, Switzerland.
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