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Scientific apparatuses for preparing, synthesizing, purifying, and/or analyzing chemical or biological samples in the medical, pharmaceutical and scientific fields, namely, microfluidic devices for use with chromatographs; analyte detectors; sample preparation systems composed primarily of mixers, filters, meters, serial dilution devices, storage vessels, and incubators; purifiers in the nature of laboratory filters, separators, and chromatographic separation columns; reaction vessels for performing chemical and biochemical reactions; and fluid pumping and handling systems, comprised of pumps, valves, conduits, mixers, splitters, storage vessels