| |
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
[104] Citation: N.E. Greivell, B. Hannaford,
'The Design of a Ferrofluid Magnetic Pipette,'
IEEE Transactions on Biomedical Engineering, vol. 44, pp. 129-135, March 1997.
Abstract
An electromagnetic pipet using a ferrofluid was designed to sample
liquid volumes smaller than 0.2 microliter. Submicroliter sample sizes
are desirable for reducing the amount of costly reagents and reducing
sample requirement for large-scale analysis. The pipet consists of four
electromagnets arranged such that air-gaps are aligned to accommodate a
tube. A light-hydrocarbon-based ferrofluid is contained in the tube and
acts as a plunger. The position of the ferrofluid in the tube was
controlled to within 0.2 mm by combining adjacent air-gap magnetic
fields. The position of the ferrofluid as a function of time and
magnetic pressure as a function of position was measured in one
electromagnet air-gap from the device. Maximum pressure measured was
770 Pascals which corresponds to a maximum velocity of 0.9 cm/s. The
assembled pipet weighs approximately 25 grams and it measures 4 cm
long, 1 cm wide, and 3 cm high.
["I would like a hard copy of this report"]
[Copyright]
[HELP!]
Updated: Tue Aug 19 09:16:09 2008
| |
