A low-cost gradient system for high-perf
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F. Erni; R.W. Frei; W. Lindner
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Article
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1976
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Elsevier Science
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English
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A device is described that makes use of an eight-port motor valve to generate step gradients tin the low-pressure side of a piston pump with a Low dead volume. Such a gradient device with an automatic control unit, which also permits repetition of previous steps, can be .buiEt for about half the cos