Simple delay monitor for droplet sorters


Grooth, Bart G. de and Doornbos, Richard M.P. and Werf, Kees O. van der and Greve, Jan (1991) Simple delay monitor for droplet sorters. Cytometry Part A, 12 (5). pp. 469-472. ISSN 0196-4763

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Abstract:We have constructed a simple device by which the optimal delay time between optical measurement of a cell and the application of the droplet charging pulse can be determined directly in a flow sorter. The device consists of a stainless steel chamber in which the sorted droplets are collected. In the collection chamber the collected droplets run through a capillary where a continuous fluorescence measurement is made. With a sample of fluorescent particles, the delay time is optimal when the measured fluorescence is maximal. The measuring volume is always filled with the last droplets sorted (about 3,000). With this device, the setting of the delay time can be done in a few seconds without the need for microscopical verification.
The fluorescence in the collection chamber is excited and detected via optical fibers using about 10% of the light of the existing laser from the flow cytometer and an extra photomultiplier.
Item Type:Article
Copyright:© 1991 Wiley-Liss
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